I actually own this mouse. I never used it in Wireless mode, but after a month or so in wired mode I kept getting "sensitivity spikes", where I would notice the mouse moving too fast. I'd check the DPI, it was on the right settings, lowering and then raising it back didn't fix it. I just kept dealing with that issue until I replaced it with a Roccat Savu, and I'm looking at picking up a Logitech G400S and using the Savu as a work mouse now.
Console war in a nutshell: http://imgur.com/xA6GJZ9