The backlash of the left key began about a year after the purchase, at the same time 2 rubber bands peeled off and the side buttons stopped working. I took it to the service, they didn’t return the money, but they said that they cleaned the mouse and the problems were just in the mud. Of course, the problems did not disappear, since at that time the dumb-nosed orcs of Sauron worked in the CSN service, but I reconciled myself. A year later (at the time of writing the review), the left button practically stopped working, the backlash felt like circling on a ship in a 10-point storm, the side buttons went into an alternating binge, then one thumps, then the other. I put two points purely because of the good shape and the backlight, which worked all the time, like a young girl at the reception during New Year's Eve: everyone is drinking and not working, and she is trying to take the situation out so that the boss gives a bonus. I DO NOT RECOMMEND TO PURCHASE, a total waste of money.