Bests & Worsts Reviews from Amazon

The Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325 is probably the best track ball around, but it is very expensive, its ball moves like treacle until it is worn in (which is a slog for a few days) and some people find it too big for their hands. The Logitech Trackman Marble Mouse mouse is a good, inexpensive, simple track ball, but it does not have any reasonable scrolling mechanism. Most of the others out there also have some or other problem. For example, my Microsoft Trackball Explorer has a sticky track ball and the buttons under the thumb just don't seem quite right. The Logitech Trackman Wheel Optical (Silver) has very good button placement, a scroll wheel and the track ball under the thumb makes for very quick pointer movement, but it is difficult to position the pointer precisely with your thumb. This one, on the other hand, has everything correct: There are no drivers to fiddle with. Just plug it in. The price is reasonable. The size is suitable for large or small hands. The ball is positioned under the fingers for precise positioning and it spins freely from the start. There is a scroll ring and it spins smoothly and freely. The buttons are a bit further from the ball than I expected, but one quickly adapts and their position means that the force is primarily downwards rather than sideways, which reduces the unit's tendency to move on a smooth surface.