An excellent replacement for the standard mouse

The reason I purchased this Logitech Marble Trackball was to relieve the stress on my wrist from heavy mouse usage.
It does a WONDERFUL job of relieving the stress on your wrist that can lead to carpal tunnel syndrome. I have worn out three mice in the past two years. I purchased this trackball thinking that for the price it would be a good experiment without costing the proverbial arm and a leg. Boy was I right in my thoughts.
This trackball is wonderful! Perfectly designed for the right or left handed person. Only a light touch is needed to scroll the marble in any direction. The buttons are placed perfectly for heavy usage. If you use your computer as much as I do (4-8 hours per day) then I would definitely recommend this trackball to you.