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Title: ergomonically speaking, very awkward
Review: was having finger numbness when using my old mouse. thought a trackball would do the trick. the design of this trackball, unfortunately, is very awkward. The "left-click" button is on the left side of the mouse, such that the act of pressing it causes your hand to move to the right (due to the lack of opposing force). I tried it for a few weeks and could not get the hang of it. In fact, my wrist started to hurt in a different place than before. I got rid of it. If you are considering this design, you should try it out in a store before purchase.
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