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Title: Screws up your Thumb - get the "Ergonomic Quill Mouse" instead!
Review: I developed tendinitis on my right wrist due to computer mouse problems, and decided to buy this product.This mouse helped a bit with my wrist tendinitis, but GAVE ME PROBLEMS WITH MY THUMB!! That part of my right hand where the thumb meets the wrist ached so much that I had to quit using this mouse. The pain disappeared soon thereafter.I now use the "Ergonomic Quill Mouse", and it works like magic! Although a bit more expensive than this one, it is well worth the money.
