My whole family now uses this trackmaster style mouse. Easy to use and years and years of use. Never miss a beat.

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.

Not the best of Logitech's, but second best. This is my 5th. The best however was the old "Trackman Marble FX" which they don't make anymore unfortunately. Using a trackball is an instant cure for carpel tunnel syndrome you get from using a mouse.

These are not for everyone. It takes a little while to train yourself to using it, deciding what functions to use for the secondary switches, speed of movement, etc. But, overall I cannot suggest a better product for any use.

This is my second Trackman, I had my 1st one for many years (15) and the left button switch finally gave out; I can't imagine what the click-count was, but it had to be very high; I hope this one lasts as long; Mostly, I am glad this product still exists, it is sort of unique.

None..., period; When my last one failed after 12-15 years, I had to use a standard mouse; I thought I was gonna' die..

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

I like trackballs, especially the ones that allow manipulation of the trackball with your fingers instead of your thumb. The Marble Mouse is ambidextrous, which makes it more usable than other, right-handed models.

Accurate Tracking; Comfortable Design; Fast Response; Glides Smoothly; Works On Any Surface

No Scroll Mechanism; Secondary Buttons Small

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.

This trackball mouse is excellent! It's the only mouse that helps with my wrist fatigue. I am on the computer 40+ hours / week and couldn't do it without this mouse.

Smooth Movement

None

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'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...