1) The mouse arrived immediately with crooked legs, so much so that the mouse walked 1-2 mm with a tremble . I spent a couple of hours with the legs erasing them so that the mouse would not stagger so much, I didn’t fix it completely, I thought it would go away on its own, but no it didn't :( 2) Often there were moments when the wire moved the mouse (when the hand was removed from the mouse) it was very annoying. 3) There is additional software for playing shooters for the mouse, but it is paid At first I was glad that such a good mouse for such money, but after a couple of months it finally finished me off. The middle mouse button became extremely hard to press.