I have fairly large hands and do not have a carpel tunnel situation but wanted to try something new. The trackball fits my hand well and, though, it takes a while to get use to using, it's pretty fun!

The classic trackball mouse belongs to a niche crowd, but after using one, it's hard to go back to the more mainstream point-and-click method of navigation. Logitech has introduced a new wireless trackball solution (via USB adapter) into this underrepresented category of computer mice , the M570...

Good feature set; Solid performance; Comfortable, natural design; Plug and play experience

Scroll wheel and browser buttons placed a little too far forward for tiny hands; Scroll wheel was too resistant

Mouse-like really feel. Wireless connection has been flawless. The storage compartment inside the unit is a wonderful concept. Very comfy. Quite nit-picky factor. The edges are so rounded that I have a challenging time choosing it up when I want to move it off my desk.Really, it's flawless.

Fundamentally, this a good product. It is conceptually sound, however it does throw a curve every now and then. It will seem to be working as expected, and then all of a sudden, it isn't. Then it usually comes back if you can be patient.

I really love the wireless function and that I can tether it to the same Unifier as my wireless keyboard. They work really well when space is at a premium as no mouse pad required. You can actually use it just holding it. The track ball socket picks up dust and dirt but is easy to pop out to clean.

My partner uses this mouse for intensive graphic design, and while she had to replace it after less than a year of use, she's quite happy with both the form factor, and its daily use. You may want to buy a product replacement plan, however, since, as I said, durability has been an issue for us.

The Good Comfortable and precise. Good button placement. Very long battery life. Power switch and stowable Unifying Receiver. Easily programmable. The Bad No horizontal scroll or free-spin mode. Noisy. Ergonomics and precision feel Veteran trackball owners will find the M570's shape very familiar.

Comfortable and precise; Good button placement; Very long battery life; Power switch and stowable Unifying Receiver; Easily programmable

No horizontal scroll or free-spin mode; Noisy

Ahhh, the trackball. Once the darlings of ergonomics-minded computer users, people often assume they've gone the way of those weird kneeling chairs from the 1980s. But like many other relics of the era-Eddie Murphy's career, spandex, and Bon Jovi come to mind-the trackball is still alive.

Comfortable, even under heavy use; Good software customization options; Long battery life.

No corded option; Left-handed users are out of luck

I have been using a usb wired versions of this trackball for a number of years. I bought this as a replacement and there are some issues. After about an hour the mouse motion becomes jittery with a short delay.

I would buy again. Actually I'll probably buy one now just so I have one if they change the design. Old dog, new tricks and all that.

I've been using this for about a year now and I'm very happy with it; Take the time to adjust the up direction in the software, it's way easier than learning "up"; I've dropped this thing so many times I've lost count; It still works.

I wish it had a few more buttons; I got the extra two programmed to "hide" and "unhide all" in Sketchup; Great for long trips, I even do CAD work in the truck when we travel; If it had more buttons and a lower price I'd give it a fifth star