Excerpt: I was excited to find a 'joystick' mouse, to relieve my clicking-finger stress-even such a tiny movement repeated all day causes stress up to my shoulder. I hoped holding my hand in one place and moving it like a joystick would be different, but that's not how it works. It's still moving a mouse around on the desk, your hand is simply in a fist rather than laying flat.
Summary: I get pains in my hands and knuckles when using a standard mouse and this is basically perfect for alleviating those pains. BUT - the scroll feature doesnt work with my Mac. Its maddening - an absolutely vital feature totally useless on my Mac. A great mouse if you have a PC, but if you are on Mac, steer clear.
Summary: I love my regular 3M wired ergonomic mouse (3M Ergonomic Mouse SMALL/MEDIUM), but because it's a bit of a pain to use a mouse that is tethered to the computer, I bought this wireless version and gave it a whirl. On the positive side, the wireless ergonomic mouse itself is a joy to use -- comfy in the hand, good quality, everything you'd expect from 3M. But the mouse comes with a fatal flaw.
Summary: I bought this mouse because i've been having a lot of pain. I work in spreadsheets and am using the mouse all day every day.
The product is comfortable but it takes me twice as long to get my work done. Within 2 weeks of owning the product, the buttons started giving out on me. It now takes 3-4 clicks to ACTUALLY click.
The lack of a scroll wheel also destroys this product.
Summary: First, this mouse has two sizes. I am 5'8, male, and have average sized hands. The small/medium sized mouse was too small for my comfort. Second, I do not like having the main buttons on the top. Those who suffer from some type of RSI are generally susceptible to other types. Using my thumb so much gave me trigger finger. I stopped using the mouse and went back to my old mouse.
Summary: My hand was too big even for the LARGE version, which made my thumb rest in a very awkward position. While my forearm felt more relaxed using the mouse, my hand itself actually started hurting. Plus the drivers are old NT4.0 version drivers. They work with XP, but just barely. No support from the manufacturer.
Summary: Well, this is one of those things that ought to be a good idea, but it isn't in reality, the time taken to get used to it is also the time it takes to realize that its not really very good, the button on top (rocker switch between left and right mouse button) makes it impossible to use both together (gaming etc.
Summary: I like the design of this mouse but after 5 minutes of using it, the scroll buttons started to stick and I realized I had to return it. Basically, the button is cheaply made and when pressed can slip under the casing, causing it to stick down and scroll like crazy. Hugely annoying. Also, if you are wondering what size to get - I have large hands (for a woman) but the large size was definitely too large for me.
Summary: I'm a power user, using PC's for 14+ hours a day. This is generally a good mouse, sturdy (though you can see the laser through the joins in the stick plastic, which isn't ideal), and the right thing if you have wrist strain. I bought it because I had a twitchy left mouse button finger, and my finger is better, but it's still not right after 2 weeks - it would probably have recovered quicker if I just used my other hand for a while.