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.

I have used track-balls almost from the start of mousing. I hate real mice. There was one mechanical ball, early on, that worked really well, and is still produced, but the price is ridiculous.

Very smooth ball operation, no doubt due to its optical coupling; (No axles or wheels to deal with.

Lack of a middle button that would work with Linux to paste

Very good mouse, easy to use

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

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

My Microsoft Thumb Ball died after 15 years. The Kensington was the perfect replacement at a good price. I have purchased three of these and they are very comfortable and convenient.

My wife is developing rheumatoid arthritis in her fingers and using a traditional mouse can be painful, but this trackball is so much easier for her as the can roll it with the palm of her hand and clisk with the heel of her thumb.

Editors' Note: iLounge only reviews products in "final" form, but many companies now change their offerings - sometimes several times - after our reviews have been published.

Cheap and nasty: stopped working properly after 3 months! Spend more, getsomething better!