I have a bit or carpal tunnel trouble and I find this the best thing on the market as my hand and arm can stay in a relaxed natural position.

The mouse keeps losing connection.

Fully featured, having programmable back and forward navigation buttons, as well as programmable left and right clicks on the scroll wheel. The comfort factor of being able to customize the angle of the mouse cannot be understated.

Disclosure: Ive used LogiTech trackballs since the early 1990s (they were a different sort of beast back then, wired and pretty much an uncontoured little box with a ball on top); this is my third by that company (which give you an idea of how reliable they are Ive switched to new units twice but...

very nice mouse, extremely function certainly a niche technology - personally enjoy the functionality for design work

If you struggle with pain and discomfort after using a mouse all day, then get this one. It takes some getting used to but it's worth the minor inconvenience and the price tag. I've never felt so comfortable using a mouse!

If you struggle with pain and discomfort after using a mouse all day, then get this one. It takes some getting used to but it's worth the minor inconvenience and the price tag. I've never felt so comfortable using a mouse!

Uses Kensington's trackballs, which cost as much as this, but Kensington has significantly better quality. This, however, has a thumb-ball which I think is more comfortable. Like all trackballs I tested this works for easier everyday tasks, but should you draw in CAD or anything that requires...

Anyone who works on the computer for at least eight hours a day will tell you how painful it can be using a mouse. Twisting and moving your hand for hours can be painful and tiring. Fortunately, using a trackball mouse can help alleviate the problem.

I recently bought this after my faithful m570 stopped and it's brilliant, couldn't go back to a mouse and I love how it's rechargeable and easy to use and fits in hand nicely