Logitech Marble (904360-0403) Trackball Reviews

Computers can cause physical strain. Staring at the image on the monitor can strain the eyes and moving a mouse back and forth and/or typing can cause muscle strain and, in extreme circumstances, carpal tunnel. Fortunately, computer hardware manufacturers have introduced many products that are intended to help reduce these various forms of physical tension and one is the Logitech Trackball Marble Mouse, a mouse that saves your wrists from further destruction.
 
Mouse Commentary:

Logitech Trackball Marble Mouse is one of the better computer accessories I have used and it offers a noticeable improvement...

Logitech Trackball Mouse

I originally wanted a mouse that I didn't have to use on my desktop.  I supervise and help other people while they are using a computer.  Occasionally if they make a mistake I need to take over and fix it.  I was using an optical mouse and we were passing it back and forth and it was awkward.  I considered a wireless mouse but I spend so much time on the computer I didn't like the idea of the battery usage both for expense and environmental reasons.

Someone suggested a trackball mouse as a good alternative because I could use it anywhere, the arm of a chair, my lap,...