I purchased this simply because I wanted to try a trackball. It is now my most-used input device. It is very comfortable, moreso than most traditional mice. Part of this is due to the shape of the trackball, but the fact that the hand stays stationary is also a factor.

- Excellent battery life (2 months and counting!; - Very comfortable

- Limited performance compared to some "regular" mice; - Poor scroll wheel

I have been using logitech trackballs of various forms since the mid 90s and find that while this works great when it works, the left button stuck after only a few months use. As I am hard on my trackballs and don't deny dropping them (as I also did with the one that lasted five years) I just think...

I recently realised that I was getting pain in my elbow and wrist and sensed that it was probably due to a large time spent using a mouse and keyboard. I have used one these in the past and decided to get one again. The mouse itself is very responsive and the battery lasts a long time.

I picked up the Logitech Trackball Mouse just over a year ago and it's still working like it just came out of the box. It's design fits your hand well and the ball is easy to manoeuvre with your thumb.

I have been using trackballs for over 30 years. I have 2 of these, one for home one for work. The one at home I've had for 9 years and just recently required replacing. I was pleased to be able to get the same model again.

If you need a comfortable trackball that has a powerful 2.4GHz signal for your tight and small workspace or desk, the Logitech Wireless Trackball M570 is perfect!

Comfortable; 80- 18 months battery life; 30 ft powerful 2.4 Ghz signal

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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

A must-have for people who have difficulty in finding the space for a normal mouse. Extremely easy to set up and use. Works just as well as a mouse.

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!

I have been using this Trackball for years. I have one for my laptop, my desktops at home and work. I find it very ergonomic and natural to use. It took a day to get used to not moving the unit like a mouse, but now it is perfect.