Pros: Supports iCUE for RGB and macro/keybinds and game profiles. Adjustable weight for those who want it (i'm using to having 2 AA batteries in my mouse, but the lightness feels good) Light weight (for me) Very smooth movement on my mouse surface. Extremely highly configurable DPI adjustments. Lots of RBG configuration for those who want it, even the DPI lights Sniper button honestly is pretty awesome for a DPI adjustment for the length of holding it down. Grippy textured surface for hand and thumb

Cons: Only 3 thumb buttons which is rathering lacking for a gaming mouse, for my MMO games I regularly use more than that (current mouse has 6), and I just can't go back to having less. Other than the sniper button the other two thumb buttons are a bit high, and necessitate moving my thumb up off the resting zone for pressing them. Scroll wheel only clicks down, not left or right. Buttons underneath the scroll dont really make sense to me, they are not easy to click with your fingers. Cable is not very flexible out of the box after being wound up, and ends up pulling the mouse when I let go.

Overall Review: I have normal sized hands and this mouse is quite large, and for me uncomfortably so, the mouses curvature where the palm of your hand rests is rather shallow compared to what I am used to in my G602, however if you have larger hands this is a good product for you. This mouse has a lot of customizability from buttons to RGB. To get the mouse out of this mouse you really need to use the iCUE software (and this is true with any gaming mouse).

Pros: The buttons are preset in their defaults. In order to change this you'll need to go into the software, map a key to the mouse click before being able use the extra buttons in game. Windows 10 does not by default allow these, and they are not mapped like a keyboard with some other devices(with plug and play). The 'snipe' mode buttons are a bit distracting and difficult to reach up to touch. They are a positioned a bit forward and up above where your thumb would naturally sit. The first button on the mouse is easily clicked with a little bit of an adjustment period. However the forward most button I have to completely adjust my hand position to click it, or use my index finger and slide it over. Not that it would be modified often, however if you shared the mouse with a significant other, you may want to swap the weights out more frequently. The bottom of this feels as if these clips are going to break under frequent use. Would of been nice to see a different style of cover.

Cons: Some features I would prefer to see on this. would be to allow for an expandable wing/base of the mouse. This would help accommodate for even larger hand sizes. Unfortunately i'm one of the lucky few who suffer from FPS sickness, and did not get to experience the mouse in its full glory using 'snipe' mode etc. It would of been nice to allow for an bubble plastic to allow a potential buyer to get a feel for the size in the packaging. If this is not on display at you're local store, you wont have an idea of size before purchasing. This could also be different packaging than is what is sold in stores.

Overall Review: Overall I'm incredibly impressed by the performance of the mouse. It is nice to get a gaming mouse for those of us with a tad larger hand. The construction of this mouse is very solid. Typically a mouse will feel like it will break from a simple drop, this has some girth to it. Additionally I prefer a heavier mouse feel and the weights are a great addition. This is pretty standard with most gaming mice now. Interestingly enough the software senses which position you have what weight installed. The Teflon pads on the bottom are wide, and seem like they should last for a substantial amount of time. This allows for smooth and consistent feel when operating. The iCUE software allows for updating firmware / any other related software for the mouse with a click. It will allow you to save multiple mouse profiles for different games. Unfortunately it is required to take advantage of the additional mouse buttons. I personally love the extra wing off of the side, this prevents any odd dirt/oils from your thumb to accumulate. Also you will have a much more natural feel when operating. The RGB on this mouse is not 'too' bright to the point where your entire room is glowing from the mouse. Previous gaming devices I've used really are too bright without the ability to dim.

Pros: I don't often gush over a mouse. Unless of course the mouse is a fantastic piece of engineering. This mouse is great --especially for someone like me with larger hands that needs a sturdier device with which to vanquish my foes. The photos in the description do not do this mouse justice. The unit is well-built and very aesthetically pleasing. The lighting is vibrant and smooth. I am really enjoying the effects that are included by default with the iCUE software and kind of wish I had an RGB keyboard to go with it for the full effect. The ability to add the extra weight is not something strictly unique to this device, but it is a feature that I've grown to really enjoy in other units. The added benefit of being able to see the properties for center of gravity and such in the iCUE software is a nice touch. I enjoy the stock weight of this mouse, but with the added weights it is just brilliant for me. The included case for the weights if you don't use/need all of them is also a nice touch --though all of the weights went right into the mouse for me. Grip is fantastic for larger hands and I felt immediately comfortable on this device and could see using it for many hours at a time without fatigue. The added precision button near the thumb is a nice addition as well for those times when you need really precise movements --just hold down the precision button and make your little tiny mouse movements!

Cons: The cable is shorter than I'd like. If it were honestly like a foot longer it would be perfect. While my grip is comfortable, one feature I miss from the G.Skill MX780 is the adjustable height palm rest. If there were some sort of way to incorporate that type of adjustment into this mouse it would be 6/5 stars for me.

Overall Review: I had previously been using the G.Skill Ripjaws MX780 prior to this and one thing I will say without a doubt is that the lighting and overall construction on this Corsair unit is leaps and bounds better. The G.Skill lighting leaves a lot to be desired after comparison even though that mouse is functionally great.

Pros: - Really accurate mouse sensor in first person shooters. - Weight system helped me tune in to the number of grams I’m used to feeling on a gaming mouse. - Robust Corsair iCue software helped me configure the DPI profiles on the mouse and other neat features such as syncing the RGB to other connected Corsair products, in my case a Corsair K95 keyboard.

Cons: - The Lift-off distance (the distance the mouse has to be for the mouse to stop registering movement) was very large causing me to have large inaccurate aim when I use low mouse sensitivity in-game and lift the mouse constantly to readjust my aim. This was the biggest CON for me. - A very large and wide mouse for medium to small hand users. - Difficult to comfortably press the left side buttons which consisted of the Forward, Backward and Sniper buttons without moving the mouse slightly causing very inaccurate aim or readjusting your hand’s palm position mid battle. - The large “wing” on the left side that is contacting the mouse pad seems add a lot of drag than I would like for a mouse playing first person shooters. - While lighting and micro profiles could save onto the mouse memory, custom DPI profiles didn’t save requiring you to have Corsair iCue launched/on in order to override the default DPI settings.

Overall Review: I wouldn’t recommend this mouse to anyone with smaller than large hands because the large and wide profile makes it very difficult to handle comfortably in fast paced games such as first-person shooters like Apex Legends. It was extremely clunky to use no matter how I tuned the weights and adjusted palms to use it comfortably. The left side buttons were awkwardly placed too high for the thumbs to press without slightly moving the mouse and the Sniper button was set too far forward to actually press for actual use in-game. The Lift-off distance was so horrid for me because I had to lift the mouse higher off the mouse pad for it stop registering movement before I could move the mouse so I could readjust my aim. This caused a lot of movement/turning time loss in-game and annoyed me during high paced battles where I would have to constantly readjust my aim to make up for the mouse’s inaccurate lift-off distance registered movement. If this mouse was smaller, lowered the mouse pad contact drag, re-positioned the side buttons and made the lift-off distance smaller this mouse would be a very good mouse for first person shooters.

Pros: -Solid construction -Corsair is a great company with excellent warranty service, if it is needed -Long braided cord -RGB that is fairly easy to use -Customizable weight

Cons: -Corsair's software for peripherals is not my favorite, but it works -May be a little big for some people with smaller hands

Overall Review: Mice are a very personal choice. Between different grips, hand sizes, and finger lengths (among several other factors) there are many different things that can affect what mouse is right for who. Given that, this mouse worked well for me. I give it 5 eggs mostly because of the great quality of the mouse. It has a few extra bonuses on to of the great quality such as customizable weight. Like most other things with computer mice, weight is a very personal preference, so the ability to change that weight is a great plus. The mouse works great, has excellent DPI options, and the software is OK. Was a great fit for me, and worked pretty well for my wife, who has small hands. She did say that it was difficult for her to use all the buttons due to the size, but seemed to like it overall as well. While I didn't take the mouse apart or anything, the build quality seems fantastic. The buttons have a nice click to them so you know it was actually pressed. The rubberized texture on the back feels nice in my hand. Overall, this is a great mouse that I would recommend to people. My cat also highly approves of the cord when it is visible to him!

Pros: I really like the looks of this mouse. The RGB lighting is real nice. I like how the lighting shines through a mesh looking material on the front and back. It’s very cool. The corsair logo looks great on the palm of the mouse and there is a lighting zone at the mouse wheel. The mouse is solid. I added all the weights and it feels like a tank. If that’s not your thing keep the weights out. Nice option. There is a-lot of grippy rubber around the mouse. No chance of my hand sliding off during the heat of battle. The size was concerning. I have small hands and the mouse seemed a bit large at first. However, after using it for a week I have become accustomed to needing to remove my palm from rest to get my finger up to the mouse wheel. Yeah.. my fingers are not long enough. Not a big deal. The left and mouse button are long so finger length does not matter too much. I have never liked side buttons on mice, I always found them difficult to navigate to and usually during the heat of a battle I never tried to use them. These don’t feel so bad. All in all The size is great and even better if you have larger hands. The iCUE software is good. Easy to manage your actions, lighting effects and DPI performance. You can calibrate the movement speed in relation to the surface that the mouse is in contact with. That is very effective and you can even tune the weights in the software. The lighting Effects are easy to change and there is a-lot of room for customization. You can adjust the DPI settings and each mode can have its own color. Recording macros for the side buttons is confusing as ever, but it's there if you know what your doing. The mouse cable is very long, 6 feet to be exact. It’s a heavy braided sleeved cable and the USB connector is a thick strong rubber end.

Cons: Only one con I experienced. I have a cheap mouse pad that has lifted writing on it. It's a blackweb mouse pad. The wing where the thumb is hits the wording on the mouse pad. Not really the mouses fault, maybe I need to step up my mouse pad game. Speaking of that wing. I read someone else's review that mentioned how the wing created mouse drag. I wonder if that person used the movement to surface calibration in the iCUE settings. I can see where the added surface contact could cause extra friction, but wing is there to prevent the thumb from hitting the mouse pad. Not really a con.

Overall Review: I really want to thank corsair and newegg for providing this product for me to review. This mouse at $80 is way out of my price range and I don’t think I would have ever reached into this range when shopping for a mouse. I can only compare this mouse to my current mouse the Gamdias Zeus M1 which compared to the Nightsword is light and now actually feels cheap. The Nightsword is built for looks and comfort. It has very high quality construction and feels solid. I would absolutely recommend this mouse for anyone shopping in this price range.

Pros: Extra buttons are placed more intuitively than previous multi/macro-button mouse iterations I've experienced.

Cons: Teflon feet are extremely smooth, which means, like with most new mice, it will accelerate easier than it seems on most surfaces. Personally, this causes me to miss my target location until I get used to it. Using a rougher (or soft, like fabric based mouse pad) surface for a while can help.

Overall Review: I'm really starting to like the side wing, which serves as a thumb rest for me. It also helps accessing the side-buttons because you get used to their relative distance from the rest position. The feel: Due to being mostly plastic, relatively speaking this mouse is pretty light, even when including full weights. This is compared to the big chungus that is Corsair M65 Elite (cheaper, but mostly metal construction), which is my daily driver. Despite plastic-centric construction, it still feels top notch in terms of durability. Braided USB cable looks like it will endure years of abuse. Since the cable is pretty stiff, I recommend getting a gaming mouse bungee (my favorite is Cougar) to save a ton of frustration. The performance: 18,000 DPI sensor gives you a wide range of flexibility. AFAIK, unlike most options up until new, this unit allows ultra-fine sensitivity increments, I believe as low as 1 DPI(wow!). I personally prefer playing using medium-low sensitivity. Nevertheless, wide range present is bound to satisfy wide spectrum of players. This isn't a simple plug & play mouse. Full potential and usability isn't unlocked until you install Corsair's iCUE software. The software itself is not bad. This includes RGBcontrol (or turning it off completely), custom macros, and fine-tuning sensitivity for each mode. This mouse has several RGB zones, which can be configured individually and independently using the previously mentioned iCUE program.

Pros: Objectively, the shape of the mouse feels pretty good in the hand while using any one of the grip styles, but with its wide body and extended thumb rest, it seems to be built for palm grip. It glides smoothly and the sensor seems very accurate and is highly adjustable. The looks are good, with the contrast between the perforated rubberized grip, flat black, and piano black. The LED zones are the best I've seen on a mouse, having a fine mesh design on the lower zones.

Cons: The reason I was sure to be objective in the "pros" is that most of my "cons" are subjective. I bought this Nightsword after using a G502 Proteus Spectrum for two years. My main gripes are regarding the buttons on the side of the mouse, which the G502 nailed. The buttons on the Nightsword feel very "un-tactile" for the most part and take a lot of effort to press. The G502 had a very crisp and satisfying feel, as well as an audible click; whereas, the side buttons on the Nightsword feel a little cheap. The other problem is with the spacing of the buttons. The buttons on the Nightsword could have been spaced apart another millimeter because it's very difficult to feel which button I am pressing. Another option would have been a small tactile bump or ridge. The only other real con to me is that iCUE software lacks the ability for the user to create individual "game profiles" that automatically load when running a game.

Overall Review: Overall, I don't regret buying this mouse. It feels good, looks good, and works well. And while in photos, it might look like a 502 copy, it's actually not all that similar - aside from the button layout.