The mouse replaces me an original Apple mouse to an iMac. It looks good and is also good in the hand. In addition to the two standard keys (left-right-click) it still has 3 more keys, which are also easily accessible. Since I use the iMac with Windows these additional keys are 8.1 using the standard already used for: Switching Desktop / tile view window hide Show Sidebar ...
That would be as far perfect, but what is really bugging these loud rasping latching the scroll wheel. An audible Raatsch, Raatsch accompanies each rotation. I bought this mouse, because I was the missing scroll wheel has disturbed at the Apple mouse most, but frankly, this buzz bothers me more to come. I have several other mice with scroll wheel in use, it is not as loud as this new Logitech M560 wireless mouse!