For the mouse itself: it is very comfortable to hold, through the right circulation are all fingers to the tip of the little finger on the mouse can be so enjoyable slide. The wheel has a distinct resistance and is VERY quiet. For longer suitable not scroll, but that is usually rarely the case.
In Driver everything can adjust everything from speed, DPI, to lift-off distance possible. This driver could be installed without any problems on Windows 7 64bit. Even after a long time is no problem, therefore, be described as stable. However, this mouse only works on a mouse pad, on a wooden surface (table) I have a little trouble. In glass I did not try it.
In summary: Solid highend gamer mouse, which is not next to market leader Logitech hide consumption. Quality and driving conviction. For sweaty hands thoroughly recommended.