I loved this mouse at first. It's comfy, gets the job done, etc. One thing that bothered me was the fact that you couldn't change the color of the wheel without adjusting the DPI setting, but that didn't bother me too much.
HOWEVER. Less than 2 months of use and becomes incredibly hard to use. Suddenly it's not detecting movement as it once did, and it's movements became completely random and unreliable. Once it does this, it's pretty much useless for things like games as you have to constantly adjust your aim. I actually went back to my old mouse because of this, and am still unsure on what to do with it.