I have this mouse now just over a year and was so far always been very happy with it. She works! On almost any ground surface, it sits comfortably in the hand, looks as chic and moreover can the mouse wheel not only down gerdückt use as a button, but also a lateral pressing of the wheel is possible (which I never actually used, but could imagine as quite practically,). Unfortunately, now the middle mouse button (ie the simple push down the mouse wheel) has given up the ghost. For so many like that do not appear so much the worse, but for me as an enthusiastic "with-the-middle-click-browser tab Opener" It is now difficult to do without middle mouse button. Pity that such an error has occurred after only one year because I was otherwise very satisfied with the mouse and give her eignetlich reluctant a lower rating. (Without this error full 5 out of 5)