Pros: Build quality, sensor, polling rate, weight customization, software tuning, price, insanely high DPI
Cons: Shipped with bad firmware, stiff "sniper mode" button
So I guess that leads to my first point, the price. This is a very affordable gaming mouse for what you get. I could not find many other options that appealed to me at this price point and provided all of these features. I was looking for a wide (claw) grip mouse with weight customization, high DPI (to compliment my ultra-wide resolution) and high polling rate. It's always a bonus to have a mouse that looks good, and this one has a pretty cool design, kind of like a space ship escape pod or something. I should also add that this mouse uses a Pixart PMW336x Sensor, which is very similar to the popular PMW3366 found in other high end gaming mice.
When I first plugged the mouse in, I fired up Overwatch and played some quick play / arcade just to get a feel for it. The results were horrendous. I think the polling rate was glitching out and it was having a hard time moving in the correct direction, also a delay on actions / missed actions? Input delay was HUGE. Well, turns out some other people on the web had problems with it, and it required a... firmware update? On a mouse? Well this is definitely a first for me, needing to update firmware on a mouse. I found this a bit ridiculous. Despite being a gamer I am also a developer who dual-boots into Linux half of the time. If I was exclusively playing on Linux (which is possible as CS:GO works on Linux & other games) I would run into some trouble. They specifically say that you need to connect your mouse to a Windows computer in order to update firmware. So yeah, if you are a Mac or Linux user exclusively, you could have some problems. For most this is no issue, but this could probably irk some people.
So after I installed the Corsair Software Utility, I went through and updated the mouse's firmware. I also did the surface calibration & tweaked the sensitivity profiles. This is another thing, if you want to use the full 12,000 DPI you need to customize the sensitivity profiles, as I think the default cap is 9,000. This is not really a big deal and 9,000 DPI is already a bit crazy. I set the lighting to solid red. The RGB lighting features were not something I cared about, although I appreciate choice in solid colors. Most of the customization is only for rainbow color modes. I don't really care to have pulsating rainbow lights when I'm trying to play a game. There is a cool mode where the lights pulse for each action you make, but ultimately that would be a distraction to you or just be some lame way of showing off the coolness of your mouse at a LAN party.
So after I configured my mouse, I loaded up Overwatch again. This time things went incredibly smooth. No input delay was noticeable. I switched DPI modes based on character, and started trying out the Sniping button on the side. This button I am very iffy about. It is incredibly handy and helps you stabilize your cross hairs. After just a few minutes it started to click in my head and I was using it on demand to lock in on peoples faces. It will take some more practice but can be a handy feature. So the part I'm iffy about, is the button is quite stiff. It's clear that they did this to prevent mis-clicks while simply moving the mouse right. However when you're trying to stabilize your cross hairs, a stiff button that requires substantial force to activate can mess you up. I'm not sure if I'll fully adjust to this or not, but this is something I wanted to mention since it is a fairly exclusive feature for this mouse.
So what's the verdict? I give this mouse a 4.5/5. Great value, feature set & hardware, with mild discomfort & initial configuration headaches. There is always room for improvement, but generally Corsair delivered a great product at a very competitive price.