Okay to the ergonomics and operation. I do not regret my purchase. But not practice on charging. While it enough, on my old MX1000, put the mouse on its support, in the evening, for it to recharge. There must be all 3--4 days, connecting for 1:30, with the wire that difficult branch. By cons, the same wire can be used for the keyboard (Logitech K800).
