Updating my review. So. When I initially got this mouse, it was faulty out of the box. Within two months it would no longer connect over wireless or wired modes. For this reason, I cannot give it a five star, despite having a functional replacement unit. I got in contact with “Chubs (SteelSeries Customer Experience)” over email. Excellent support. We concluded that it was an issue hardware side. For that reason, I struggle to recommend this strongly. I got my replacement unit and I've had it for about two weeks with no issue.
This mouse is absurdly lightweight. Plays fantastic in FPS games such as CoD, and I feel like I've played the best that I ever have in years. The side buttons are great for MMORPG too, such as FFXIV. They're customizable too so I have some macros set up like auto clicker and app control (Spotify) in a separate profile to when I'm playing games that actually require all 12 buttons. Speaking of which, the buttons take a little getting used to, but it's not too hard to figure out where which buttons are. I will say it could be a little difficult to comfortably reach all buttons if you have small hands. It's an expenny mouse for sure, but if you need a mouse that's great for FPS games and MMORPGs both, from my research and experience, there's nothing better.