Frankly, the ceramic runners, it's something really wonderful !!! The mouse glides alone, without any effort, as if it were on an air cushion. Accustomed to wireless mouse, I'm not at all embarrassed by that one. Clipped on my mouse pad, it is soon forgotten in fact. However, the interface is a bit disturbing, because it was the hand, not in the mouse extension, but a little askew. So, sometimes, the hand tends to slip. But this detail is especially bothersome when working on the desk, or on the internet (there, I quickly revert to my Logitech MX Revolution). By cons, in play, this mouse is really terrible!