After my old Logitech mouse had more and more battery problems and the battery was not able to be replaced, I have decided for the Logitech G700. After unpacking, I was surprised first about the weight or feel, because I would have honestly expected more. Feels almost anything cheap. Apart from this subjective opinion but the mouse works flawlessly under Win8. Despite intensive use they previously had no fatigue. Very pleasant I found here is that the mouse can be used even with a dead battery simply via cable further and is charged at the same time. But this is also the - currently the only - point of criticism: The battery is empty very quickly. Since I'm used to a significantly longer duration with my current laser mice. Here Logitech had installed instead of a battery rather two. So I have about every 4 days on the river.