I worked for a year and 2 months - the wheel began to scroll (you turn in one direction, but in fact the page / menu items / files jump up and down). The longer it was used, the worse the problem became. He endured 3 months, could not stand it - he took it to the store after 1.5 years - they replaced it without any problems. Today a year and 2 months have passed again - this problem appeared again, in fact, the reason for writing a review. The store agreed to accept for inspection through delivery (Hong Kong store, I'm in the regions) and send a replacement. But the desire to stay on this mouse is no more. There are enough photos in other reviews, there is nothing new to add with pictures. Unless the wire fluffed up (quite a bit) at the moment of contact with the corner of the table.