I haven't done much testing besides on the Classic. I am guessing it is a whole lot better with a bigger screen and the correct OS for the control panel. Haven't had time to try it on that but otherwise it's the same as you'd imagine a trackpad on a 9inch black and white screen. It is on a speed that is a little too fast and the mouse control panel doesn't seem to change anything. The clicks on the left and right buttons are strong and don't feel cheap. The numeric keypad feels exactly like the new keyboard I have next to it. For less than $20 it's something neat to play with and look at along with the other weird mac crap. I'm trying to get some odds and ends before I can't afford any of the ebay prices anymore.