I bought this mouse and shipping was very quick. I plugged it in and it worked perfectly, didn't have to install anything. I used it for a good 4-5 hrs and the next day (computer being on the whole time) it stopped working all together. System restores, device drivers, dell tech support... 3 hrs and nothing helped.Mine was defective and I'm going to be returning this back to amazon and going to try a logitech.