Summary: I have been using this 3M ergonomic mouse for past 3 weeks now and I am pretty impressed that the pain in my arm and wrist that has been there since 6 mos because of herniated disc in my neck has almost gone.
Summary: I would highly recommend this mouse for anyone looking at an ergonomic alternative. Plug it in and works right away. Only downside is that after 2 years it started reading single clicks like double clicks. So I had to buy another one. So it may not last as long as a traditional mouse.
Summary: I've been using this mouse since March of 2009 -- more than two years, as of this review. Like other reviewers, I have found that it works as advertised, though there are a few flaws: + Buttons are cheap-feeling, as is overall construction. It doesn't look bad though.
Summary: Easy to use, easy to get used to. It keeps my wrist straight as I use it, which relieves carpal tunnel pain in my wrist. It is NOT a joystick, there is a laser light on the bottom, which means it still needs to be used on a flat surface.
Summary: Although I don't suffer from carpal tunnel, my elbow can sometimes get sore when I pull crazy hours at the computer since my job requires me to use the mouse in excess and mostly for fine operations. I got this mouse to try and alleviate that problem somewhat. In that, it's successful.
Summary: I purchased one for work and after a year or so I had to have one for home. I knit all the time and want to take care of my hands. Make sure you get the right size. I had the large one for a short time and the reach for the thumb was not natural.
Summary: I love this product. I only have a couple of suggestions for 3M. I have such a hard time with a mouse. I have early CT in my wrist but my job is on the computer. I also have very small hands. I got the smallest one they offered though it is still a bit too big.
Summary: I have a evoluent vertical mouse which I love because it gave me immediate relief from RSI symptoms. But I thought i'd give this a try after finding the scroll wheel causes me discomfort. This shape is weird and the scroll takes some getting used to but totally worth the trouble.