Stefan Mileschin

After using the Viper Ultimate in productivity work but also games such as Terminator: Resistance, Mass Effect Andromeda, Beyond Two Souls and Borderlands 3 we became really fond of it thanks to the flawless tracking, very good battery life and low weight. The new optical switches have a good feel to it and the actuation noise is quite different from the mechanical switches, the click noise being less sharp. The Viper Ultimate can be used with multiple grip types, depending on the size of the hand, while the left buttons remain easily accessible (the right-side buttons need some time for accommodation, if you are using the mouse as a right hander).

http://www.madshrimps.be/articles/article/1001181/