[OldCoot]

I've used a Logitech Trackman for years and prefer it to a regular mouse. I guess you could call it economy of motion. Why use your whole arm when just a thumb will do? For a "leftie" it wouldn't work because the ball is on the wrong side, but those with the center ball should do. If you are one of those people who like a lot of buttons, maybe not so good. As a reference, TerryP's comment about liking a touchpad, I personally hate a touchpad. Maybe I am a little too heavy handed, but I was never able to make friends with a touchpad but tolerate them on a laptop.