Device is good but software .. When I defined Left Button as "click" I can not define it with button from keyboard i.e. LB + Ctrl. The only one definition is possible. Total disqualification.

Comfortable Trackball Mouse that is easy on your wrists. Fits the hand nicely.

This was my first experience of an optical trackball and I would recommend this to anyone. The amount of software included with the device allows adjustment to your exact needs.

Very good mouse, easy to use

The scroll ring makes it much easier on the shoulder. A great way to combat RSI.

Ambidextrous design - smooth ball operation - small footprint - scroll ring (handy for viewing webpage or long documents - Inertia Scroll feature - great way to fight off RSI - rubber wrist-pad included

- too light; needs to be heavier - plastic housing gives it that cheap feel - rubber soles not grippy enough - scroll ring feels like it's grinding on another surface

If you want a trackball with a scroll wheel, you can't go far wrong with this.

Smooth scroll wheel; comfortable; performs well

Can get sluggish when dirty; care must be taken when cleaning

this is a great product. really solid and more like a rubber tire thickness then a flimsy rubber. only thing that suprised me was that it is not solid across the back - it fits around the edges only - but it sits high enough off the ipad and is wide enough it really protects.

the trackball is the best one i have used up to press and it is a lot cheaper than other trackball's.

It felt natural using the trackball except for the right and left click buttons that felt too far way from the centre of the device. Resting my palm on it also felt good without and strain on my wrist. I use this with a regular mouse.

-Comfortable to use; -Tracks smoothly; -Scroll wheel

-Right and left click buttons feels a little awkward to use

If you're at the computer for long hours, using this trackball is great relief for a painful wrist. I used one for more than 5 years at my last job. When the new employer didn't have them, I rushed to order my own. The price is great and worth every penny.