I got the mx518 for office use, and it's great - I used the mouse 8h/day and it's very comfortable and the thumb buttons make browsing the net a peace of cake. Anyone else using it for non-gaming purposes?

This is an all purpose gaming mouse that provides the best all around customization in World of Warcraft and still function as your daily driver for web browsing and excel, the actual programs that pay the bills. I haven't really found a good replacement for this mouse that can be great for both gaming and regular day to day work.