My favorite trackball EVER!

Requires very little cleaning--I've had mine for 7 years, and only clean it once in a while, when the pointer starts to look a little choppy.

Nice design, flatter than most trackballs, so that you don't have to arch your hand strangely to operate it. Left and right buttons click easily, too

Very responsive...I use it for playing games, as well as for ordinary computer tasks, and it serves me well. I have fibromyalgia, so it's important to me to have a trackball that's easy to use. The Orbit fits the bill!