I love razer, I finally this last weekend retired my Diamondback that I've had for 4 or 5 years that was developing a bit of an issue with the scrollwheel and grabbed a Lachesis. I saw that this one was out, but haven't really found the "ergonomic" shaped mice to be all that comfortable. @kimboy: Sure, it's possible to complete games just fine with a generic brand optical mouse, but the two things I look at are comfort (Razer especially shapes their mice very nicely) and competitive performance. If you have (physics-style frictionless vacuum example) two people with exactly the same reaction speed, the person with the mouse that has a higher sensitivity and faster click response time will come out ahead. Mostly it's just for people who don't look at "can I play a game with it" but "can I play better than other people"