Pros: Extremely comfortable ergonomics works with both the left and right hands.

Excellent weight that can be adjusted, although I prefer leaving all of the weights in

Extremely smooth operation that glides with ease over a mousepad

Textured sides is easy to grip, without being grippy - if that makes sense.

Buttons have very nice "click" to them. My previous mouse was a basic Microsoft Mouse and this definitely has better click-feel.

All buttons are programmable

Front LED logo can be changed or turned off using software

Ease of use in quick selecting the DPI on the mouse without additional software

Instantly worked on Windows 10 without any additional software

Cons: I would describe all of these cons as nitpicks as none of them are significant enough for me to dock an egg.

The Corsair software is pretty clunky and doesn't pair up with other Corsair utilities like Corsair Link for the H80i water cooler, so I have 2 separate Corsair logos in my system tray at all times. The programming of the buttons isn't intuitive.

Although you can turn off the front lights, you have to do it through the software. There is no quick "night mode" for the mouse at night. For this reason, I just leave the lights off. It's gimmicky anyway.

I don't use the dedicated 'Sniper Mode" button so I mapped it as my main back button, because I find the default "back/forward" buttons to be a little too small. This is probably the biggest con of the mouse. I think the back/forward buttons could have been positioned a little better.

Other Thoughts: Although I do some PC gaming, I would not describe myself as a hardcore gamer. Ive always found that a traditional 3 button mouse with a back/foward button to be "good enough". Ive spent extra on gaming keyboards, but never a mouse. Now I know that I've been missing out. This is an excellent lens that really feels high quality in almost every regard. The ergonimcs are great, I can use this both left and right handed, the buttons have the best "click feel" of any mouse Ive used (even better than a Microsoft Mouse). The weight of the mouse is splended and so is the texture.

I should point out that while NewEgg sent me the "white M65-W" mouse, mine doesn't look like the picture above. The top shell and L/R buttons are white plastic, but the bottom, sides, and that channel above and below the wheel are black on mine. I actually like the look of mine better than the image above. I assume Corsair has redesigned the mouse, but Newegg just hasn't updated the picture.

I've never been a fan of Corsair's software, and this time its no different. I dont care for the Corsair Link software for the H80i water cooler and I dont like the software here. Even more annoying is that Corsair doesnt have one single program that works with all of their hardware. Every program is a separate install which means you see two identical Corsair icons in your system tray.

The good news is that if you dont have a need to remap the buttons, create macros, or change the lights, you don't even need to load their software as WIndows 10 not only detected the mouse correctly, but all of the buttons worked in their default mode.

I mentioned in my cons above that I wish there was a way to mute the lighting without having to go into the software, but thats a minor quibble.

Finally, perhaps the best endorsement I can give this mouse is that my non-gamer/non-geek wife likes it. She rolled her eyes at the gaming keyboard I bought and doesnt get excited about hexa-core processors, DDR4 memory, or SLI videocards, but she said that she really liked the mouse, so getting that endorsement from her is pretty significant! :)

Pros: I find the overall design of the cooler and radiator to be pleasing. Although I am a veteran of building PCs in my lifetime, I've never installed a water cooler before, and I did not find this to be difficult. It's about as involved as installing a large air cooler. You need a backing plate behind the CPU socket, there are some standoffs you need to screw in, and then you mount the cooler to the CPU and screw it down. The radiator and fans caused me a few issues, which I'll cover below. There is also a USB port on the cooler itself that requires a whole USB header free on your motherboard. This shouldn't be an issue for most people as modern motherboards often have way more USB headers than most people need.

This cooler is definitely quiet during regular use. Although the DEEPCOOL cooler I had before was extremely quiet due to its rubberized 140mm silent wave fans, the Corsair is almost completely silent under most conditions. I played with the Corsair Link software and changed the settings to Balanced and Performance and it got noticeably louder. In Performance, it was disruptively loud. I would never want to use that setting.

This cooler replaced a DEEPCOOL Gamer Storm Lucifer V2 CPU with dual 140mm silent fans in push/pull configuration, so I was able to do a before and after test and in 2 of the 3 tests, I saw an improvement in temps, see the Other section below for specifics.

Cons: In total, not including removing the air cooler, installation took me about half an hour which I consider good because I take my time. Anyone experienced in building PCs shouldn't have a problem with this, but for the novice, I felt the instructions were a little lacking. Corsair takes an approach many PC vendors do and makes instructions with basic drawings and then short directions in a variety of languages. I was installing this on a Socket 2011 motherboard and there was one step where they show you need to use different standoffs to use and the drawings were so poor, I couldn't figure it out based on the drawing. I ended up just picking a set and using trial and error to see which ones fit. So I'll say the instructions were adequate, but as a "premiere" PC Vendor, Corsair could have done a better job here.

Another issue I ran into, which might be unique to some people is that the mounting screws for the radiator and fans were too short for my setup. How this works is you get 8 long screws and washers that go into each corner of the two fans and secure it to the radiator which is sandwiched in between. For the front fan (nearest the CPU), its not an issue. The screws are long enough, but the rear fan (nearest the back of the case), the screws were not long enough to go through the thickness of my case, through the fan, and into the radiator. I have a Lian-Li midtower case and the rear fan opening has a removable grille. The removable grill isn't that thick, but it was just thick enough to make it not work. I had to remove the rear grille in order for the screws to reach through everything and grip the radiator. So now, the back of my PC has a large opening with the fan blades directly exposed to the outside of the case. I am going to try and locate some longer screws at a hardware store sometime and see if I can use those so I can put the grille back on.

Both of these cons aren't deal breakers, and I understand Corsair cannot predict every possible of the millions of combinations of cases people could use, but how hard could it have been to include a couple of extra sets of screws of varying lengths so the installer can choose which ones best fit.

Finally, I found the included 120mm fans to be unacceptably loud in performance mode. I cannot image why anyone would want to use that mode as the fans spin at their max speed. Maybe quieter fans could have brought the noise down, but for what you get in the box, I feel that Quiet and Balanced are your only two real-world options.

Other Thoughts: My testing setup:

ASRock X99 Extreme4 LGA 2011-v3 Intel X99 motherboard
Intel Core i7-5820K Haswell-E 6-Core 3.3 GHz CPU Overclocked to 4.0 GHz
LIAN LI PC-7FN Black Aluminum ATX Mid Tower Case
DEEPCOOL Gamer Storm Lucifer V2 CPU with dual 140mm silent fans in push/pull configuration

I used Open Hardware Monitor to monitor the CPU Package temps and ran 3 tests:

Idle
10 minutes of the Unigine DirectX11 Valley Benchmark 1.0 on Ultra quality running at 1920x1080 with sound enabled
10 minutes of Prime95 running with 12 threads simultaneously

I used the Valley Benchmark to mimic high GPU gaming. This should be close to what the CPU would experience while playing a modern PC game such as GTA V, Dyling Light, or Witcher III (all of which I have). And of course Prime95 is a tried and true CPU torture test, although it recreates conditions unrealistic for regular PC usage.

All of these tests were run with the Corsair Link software set to Quiet. Here are my results:

Idle Air Cooler: 103 - 104 degrees F
Idle Water: 98 - 102 degrees F

DirectX11 Air: 120-126 degrees F
DirectX11 Water: 108-112 degrees F

Prime95 Air: 172-176 degrees F
Prime95 Water: 168-176 degrees F

It is interesting I saw a few degrees improvement at idle temps, and about 12-14 degrees improvement in the DirectX test, but nothing in the Prime95 test. My theory with this is that my overclocked CPU is being pushed to the thermal limit of the chip. I believe that the CPU is throttling itself at that point and neither cooler is able to keep the temps below whatever point that is. While it would make sense that the water cooler should have shown better results in the Prime95 test, I think that in both cases, the air and water coolers were interrupted by the CPU's own thermal protection. In hindsight, I should have done this test again with the CPU at a stock clock, so maybe I'll do that again later and update this review. Frankly, the Prime95 test isn't really all that useful anyway, since no one runs it for anything other than these kinds of tests. I mainly use this PC for general Internet use and gaming, so the DirectX11 test is the one that's most useful for me.

So, in conclusion, yes, the Corsair bested one of the best air coolers you can buy. For $100, you do get a few degrees improvement at idle, and about a 10% improvement in gaming. I doubt there is any other all in one product in this range that can beat that. I still can't feel a bit underwhelmed though. Maybe if I was coming from a stock cooler, or a low end cooler, or maybe even with a different CPU, I would have been more impressed. My advice is that if you are building a new PC and have $100 in your budget, this is a great buy. If you already have a really nice air cooler and want to see what this product will do, its probably not the best use of $100.

I also feel that Corsair could have done a little better of a job in the instructions. Sure, its fine for a veteran, but a novice could really struggle with the instructions, and I know that Corsair cannot predict every possible case that this would be installed into, but it would have cost them maybe 5 cents extra include a couple sets of screws of varying lengths to accommodate thicker cases.

For these reasons, I give this product a 4 out of 5 rating.