Excellent mouse, but a bit disappointed

First RAT and first disappointment. It turns out that the pads are not of excellent quality, some angles are unpolished metal, which hangs on the carpet. I oxidation of the second wheel and the screws removed for changing remove the mouse plastics. I liked the ability to adjust as you like mice, maccros, and to add weight. Very nice package. Weak point, the previous mouse button no longer worked after 3 months of use