I've been using these for about 14 years now, dating back to when it came in beige and only had a PS/2 interface on it (modern versions are silver and USB, with a PS/2 adapter included if you need it).

Not a great product! There is no scroll wheel and the placement of the buttons is not at all comfortable for either short term or long use.

I'm not saying this is a bad mouse, it's a great one, that allows precise tracking and greater comfort than the vast majority of the market.

When I first purchased this mouse, to replace my original, standard 2-button mouse, I was hoping for a fantastic, revolutionary replacement. I don't think I have been let down. When I first got hold of it, and set it up, useage was slow and difficult to say the least.

Ergonomic design; Ease of use; Low desk-space usage

Price

I have a very cluttered desk so my mouse was not getting frustrating to use. I bought the trackman thinking it would just be a capable substitute, but it exceeds the mouse in every way except scrolling... Find a way to improve the scrolling and it's pretty much perfect.

Just an excellent product for left and right handed people who don't want mice running all over the place! It is my favorite type of mouse. I think it is just about as easy to use as a trackpad, perhaps easier since the left and right buttons are so handy.

The only space you need for this is the space that is the same size as the vice since it doesn't move; They are fairly long-lasting and that is a plus also; The main left and right buttons are reversible through software

It isn't as comfortable as it looks if you use it for a long period of time; After a while, the standoffs for the trackball need to be cleaned off; The ball can be lost

Excellent User friendly mouse! No driver CD required.. and very convenient for using in designing!!

I've bought almost every trackball ever made in the past twenty years - each one excels at one thing, fails at another. I have yet to find the perfect trackball. This one is without doubt the most comfortable one I own: it's a great shape for the hand and the exposed trackball gives you huge control...

I have used one of these for years. Great control, no moving the thing around, great for limited space desks. As for those who complain about not having a scrolling function, it is on the disk that came with it, install the software and you've got it. HIGHLY recommended!

This is my 3rd Logitech Trackman Marble Mouse. Must be something that I like about it. A couple of years using it to play Skyrim and then it is time to get another one. Skyrim must be pretty rough on it.