Dead easy to install. Does not have the "speed control" that microsoft has. That is the little arrows that scroll according to mouse position. The wheel works just fine though. Mouse is very smooth accros the desktop. Forget the extra two side buttons, they are useless. Not at all "ergonomic". The left and right click buttons could be lighter, but the ease of movement forgives that. $50.00 is more than enough. We are going to keep it. Jeffo.