Positive: good grip, pleasant touch materials, battery economy (or batteries) seems to be the point, already a month without rechage with long, almost daily use (15h). Very precise, both on the road with the scrolling wheel. Even if you feel some relief; I'm not sure the position completely corrects forearm twisting problems, but it seems to me, for against, the shoulder is requested here. I use a KVM without problems, actions on the 5 knobs are transmitted. To add its price / quality ratio that seems unbeatable.
Negative; materials give a warm feeling after a while, this causes a slight sweat from the hand that mark in plastics.
