I have tried almost every ergonomic mouse on the market. So far I've used all sorts of mice for a while and then one or the other spot on my arm started to hurt and then I had to switch again. I bought this mouse on a whim just to try it out as the price was low. The return cost was about $6 or $7, which was about half the price of the mouse, so I'll try to resell it or give it away as a gift. Instead, buy a mouse with a rolling ball where the ball is. in the middle, not right or left. Since purchasing this pen mouse, our office manager at work has recommended this new style of mouse (ball in center) and it has worked great so far. Save yourself the hassle and just buy one of these. I'm not sure if they are available from Revain, but it is possible. I'll try to go back and post the make and model number of that other mouse in case anyone is interested.
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