The first impression was, the workmanship is very good, the materials more (t) s quality. But now comes the surprise. The mouse is in aluminum look maintained, to go with my Mac. However, where my why and my fingers rest on the sides it is no longer in silver but copper-colored and did not expect at the time. I'm a developer and not a power user or gamer. So who is not a casual user and use the mouse often, not only from time to time in the month and on the road, will be able to show any long beautiful mouse. I find that very annoying, even the Logitech unable to be updated for the current version of MacOSX drivers, which greatly limits functionality. There was plenty of time in beta, but Logitech was not able to update the Control Center.
