Pros: This is very nice mechanical keyboard with brown switches (my favorite). I'm finding the LED lighting to be far more fun than I expected and the MasterKey software download works great. I'm rating the product itself with 5 eggs, but please read the Cons section regarding the vendor Compute4Less Corp.

Cons: Bought this through Newegg via a 3rd party vendor called Compute4Less Corp. Compute4Less gave out a bogus tracking number and then provided another one a week later. Took two-an-a-half weeks to deliver on an order that was suppose to be in-stock (and i paid for 3 day shipping!). I called them 5 times and emailed but no response. I will never buy from Compute4Less again. Compute4Less Corp gets a zero eggs rating.

Pros: - No bloaty software required, all functions and settings can be adjusted from the keyboard - Decent amount of macro and led customisation, especially given no software is used - Bright and even LED lighting - The fantastic Cherry MX Red switches - Detachable cable that can be routed either out the side or top of the keyboard - Includes a keycap puller

Cons: - A volume roll bar would have been nice - The OS key is the CoolerMaster logo.

Overall Review: If you're after a white-LED mechanical keyboard, get this.

Pros: I love CoolerMaster keyboards. I now have three of them and this one is now my favorite. I have Cherry MX Red, Blue, and now Brown Coolermaster keyboards. Really getting a feel for the browns and I think I now prefer them over the blues. CM took their time with and RGB keyboard and I think it's really paid off. The MasterKeys Pro L and S(mine)are no nonsense keyboards. Much like a lot of other CM keyboards, the Pro L and S have a minimalistic design. Functionality and features are great if you're willing to learn how to use what the keyboard has to offer manually. I'd recommend this keyboard over just about any other. I love the look and feel of the Pro S so much that I'm thinking of getting the Pro L once I buy a new desk. CM knocked another one out of the park!

Cons: It's much a less a con and more of a minor complaint about something that's more of a preference than anything else. I don't like that there are CoolerMaster keys where the Windows logo key would be. I'd much rather them offer me some Windows logo keys made for backlighting on the Pro S.

Pros: The keys feel great, and the lighting is awesome. This product also has great build quality, and does a really good job at typing and gaming, making key-presses feel natural.

Cons: Occasionally, the keyboard will drop out, and not connect to my computer. Usually unplugging it and plugging it back in fixes this problem, however, it can be a bit of a hassle. I only have this problem after shutting down and rebooting though.

Pros: -Great colors -Easy to use -Great feel and weight -Gives me a lot more space being 10keyless -Easy to setup and use profiles, change color schemes etc -Feels amazing to type and play on

Cons: -Would have been nice with an included wrist pad, sits higher up than a regular keyboard -Now I have to buy a mechanical with browns for work

Pros: I have a CM Storm QuickFire XT which I love and wanted the exact same keyboard with LEDs. I didn't want the colors, just a high quality keyboard that I can use in dim lighting. This keyboard is very close in build quality to the CM Storm QuickFire XT, with LEDs. It is also very durable and almost as heavy as my other keyboard. My 3 year old has dropped it a spilled Orange Juice into it and after a little clean-up, it's good as new. Love the packaging and the braided cord and the price. The LED patterns are cool, but I won't likely use any of the features. I really appreciate the minimalist styling. Cooler Master makes keyboards that I like.

Cons: I wish the case was made out of metal or a sturdier plastic. This one is fine, but it could easily be better. My other Cooler Master is heavier and the case is plastic, but thicker and with a cool grippy feeling finish. This comes close, but seems a little bit cheaper. Overall, the build quality is still very nice, but it also still seems to be cheaper than my older Cooler Master keyboards.

Overall Review: I would highly recommend this keyboard to others. It is very nice and straight forward. You can control a lot of the features from the keyboard itself. Well built. Will probably last for years and years.

Pros: I recently became in need of a new keyboard after mine stopped working, I also had just given my backup keyboard to a relative. So I got to the fun part of buying a new keyboard, and I researched as best as I could and had to decide between the K70 lux or the CM MK Pro L. After asking Reddit about it I decided to give the MasterKeys Pro L a chance because I had already tried the K70. Specs - 1090g or 2.4lbs - 108 Keys - Full Backlit (RGB) 16.7M Col/ors - Anti-ghosting with N-key rollover (Windows Only) - 1000 Hz / 1 ms - 32bit ARM Cortex M3 - 1.5 Meter Cable Length (Go*ld Plated Micro-USB) - Mostly Plastic Construction - Cherry MX Switches" So right of of the box I realized that the keyboard defiantly had some weight to it, and after having it on my lap for a couple hours it is a lot lighter than other keyboards such as the Razer Blackwidow Ultimate. The Gaming and typing experience is very pleasant, and considering I'm using Chery MX Browns. I really have to say I enjoy the feel of the feedback on the browns compared to other Cherry MX switches. The RBG lighting is super vibrant and is different compared to other keyboards, this is due to the larger LED in the switch housing. And the keyboard can put off a truly spectacular show of light effects. The lock keys have their LED's turned off unless they are on, which really cuts down on the need of designated lights for the on/off indicators. I prefer this because I can set their color to stand out against others colors. The FN Key operates the media, volume, macro, and color keys. (there is no delay) I like this setup but I really wish there were independent media keys and a volume wheel like on the K70. If there was anything that outright bothers me about this keyboard, it would have to be how short the cable is and how it uses a Micro-USB. The Razer Blackwidow Ultimate has a cable length of about 6 feet, while the CM MK Pro L has a cable about 4 feet. It barley reaches my PC which is right next to me. The detachable micro-USB was a bit of a disappointment, because imo if they wanted to do a detachable USB cable they should have used a USB 3.0 type C connector instead. But overall this is is a very decent compact keyboard, and I would recommend it to anyone who has low desk space and or doesn't want a behemoth.

Cons: - Micro-USB 2.0 instead of a Type C USB 3.0 - Short Cable 1.5 Meters

Pros: Cherry MX Brown switches. Light, tactile, and consistent. RGB backlighting that does NOT require software to configure. Yes, the software gives you much more control. But once you save the lighting profiles to the keyboard, you don't need the software. It's a very compact and clean design. You can have as gaudy or as professional of a lighting setup as you want. And the straight edge at the bottom makes it very easy to pair a palm rest of my own choosing. Build quality seems robust and durable.

Cons: A more robust cable retention system would be appreciated. The micro USB connection on the keyboard is definitely the weakest point, and the most likely to fail first. I don't know if the right angle connector is supposed to help with this, but I would have liked a solution similar to the one found on the Pro L keyboards.

Overall Review: Nitpick 1: The bottom half of each key is noticeably dimmer than the upper half. Nitpick 2: I'm not a fan of the design of the included keycap puller. Nitpick 3: No included instruction manual. You have to go online.