To make short, I am very disappointed with this mouse. - Firstly it is a lousy ambidextrous mice, fingers on the outside of the mouse (ring and little fingers) have no real locations and find themselves huddled on the like side. So time to time we support awkwardly on the opposite side thumb buttons. - Secondly, and not least, the very sensitive sensor tend to capture every little dust, is not giving a pleasant feeling at all and forces me to blow into the sensor regularly (even during game). - Finally, the synapses drivers are not really optimized, there is among other rough characters in the setting window and above all he took me off the screensaver to prevent a black problem on a game ...