It does the job and does it well for that price (30)! Caution, however, is a "big" mouse. This is what we wanted but better be warned. It is configurable at will (with CD program): sensitivity, features 11 buttons, LED color and intensity, macro programming, Profile, IPR levels, frequency, weight, ... It works fine on Windows 8.1. On the negative side, well ... y 'has not for now! See now in duration. A highly recommend for a small price gamer mouse.