So i got this so i can switch between computers one has Bluettoth the other is dongle usb. this worked great but it had issues switching to bluetooth some times or back to the dongle so it would start to reinstall itself every time. that kind of got anoying but it works. the size is a tiny small for me but it works as i need it to. i do like the idle timer to save on battery life. this also has a nice silent click to the point im thinking im not pressing hard enough. took me a while to get use to that all in all not to bad for a usb and bluetooth mouse.