Orbit Optical Trackball

This is much more comfortable to use than a standard mouse. The ball rolls and the mouse doesn't have to move around the desk, so although it is quite big, it doesn't need extra space around it I have used one of these for over 5 years and have never...

Absolutely none!

Ease of use

Ball loose in cradle

easy to use, allows my hand to be flat

no bad points

Easy operation for those that accidently click a conventional mouse while moving it.

could be more stable if heavier.

Worked first time as plug n play. Very sensitive and positive ball response.

No equivalent to the mouse wheel so needed to keep the mouse as well for quick scrolling.

EASY TO USE. SAVES DESK SPACE. SIMPLE.

NONE

Easy to use with either hand. It stays in one place taking up less space. Helpful to prevent RSI or to cure it.

None.

Very comfortable and accurate. Moves very easily. Just plug it in and away you go, it's as easy as that.

Easy to set up. Reduced wrist pain.

Fairly difficult to get used to. Not adjustable for speed/disrance.

Easy to get used to

Did not expect it to be so big