Review on Razer Viper Gaming Mouse, Black by Michal Wojcik ᠌

Some pros: Good response. Pleasantly working optical buttons. Big size for my palm. I think the mini version would be more convenient for me, but this is not a drawback. The backlight is bright, but only about the icon area. Has cons: Sensitivity control is implemented by five adjustable positions with the button on the bottom of the mouse. It is not very convenient to raise the mouse and switch them. On the good old X7, this is implemented more successfully. Too light.