I bought one, on the second day I exchanged it in the store - I thought marriage, it turns out they all work so crookedly. While I use it, the warranty is good, but I feel it's time to take it ( Pros below: really quiet, except for scrolling. He was loud at first, then dispersed. Its cons: Works ugly. The cheapest mouse does not move horizontally so crookedly. You select the text on one line - the cursor will definitely go up or down. Well, how is that! ?! ?