Summary: Without this mouse I would most likely not be able to continue working. I work at a desk and perform clerical work all day. I suffer from tendonitus in both of my wrists/arms. I have this in the left handed version as well. It's the only mouse I can use all day that doesn't cause me extreme pain. I highly recommend this product.
Summary: it died within 2 months of usage, I called evoluent and there customer service never picks up the phone Its a wife and husband business that can bearly have time to even provide technical support. After failing to trouble shoot me via email they told me there was nothing they can do.
Summary: Bought this for my husband for Christmas 2011. He's been using it 1 full year now. The mouse has continued to work perfectly. The biggest deal, my husband has chronic shoulder and elbow problems...this mouse doesn't aggravate either. Yeah!
Summary: I was having recurring wrist pain from using a regular mouse so I decided to order this, despite the pretty steep price tag. But even though it is expensive, it has been worth the investment. The mouse works well on almost any surface, the responsiveness and accuracy is as good as any other mouse, and best of it solved my wrist pain problems. I've been using it for 4 months and the mouse performance is great and my pain is gone.
Summary: ....and my fingers. Working for 12-14 hours a day isn't ideal but this mouse saves my hands. I've had it for about a year and the wireless is just starting to give me trouble but other than that, love it! Would recommend this to anyone with wrist/hand problems/carpal tunnel.
Summary: My wife bought me this mouse; I use the wired version of it at work. I can recommend the ergonomics of it; I was developing a wrist problem from all the mousing I do at work and home - within a week of getting one of these at work, the problem began to improve and it's completely gone now.
Summary: 4/Sept/2012: This is a 200 day review of this mouse. I LOVE THE MOUSE. It was a little strange to get used to it at first. But now I cant work without it. The reason why I am stripping away a few stars is because of the following reasons: 1. Phantom clicks: Initially I thought I was hitting a button accidentally given the fact that to move the mouse, you have to hold it. The holding surface might have buttons that get clicked while moving. That is not the case.