This is came out in .
This is a improvement over the classic Logitech Trackman Wheel. Here's major improvements:
Overall, it got positive reviews. However, compared to the classic Logitech Trackman Wheel (red ball) , the ball is a bit smaller and is a little more stiff to spin. This is also twice as expensive.
The ball diameter is 34 mm.
For replacement, you can buy at amazon
A veteran trackball user ( nsrpgmiv ), who has owned many different models of trackballs, made a comment that i think is very insightful and i agree with much. He pointed out that trackballs designed for the long fingers is much easier to operate than the thumb. This you can easily test yourself. With thumb operated ball, it assumes your palm sits still, thus your thumb movement are limited. In particular, going up and down is of limited range. With index finger operated ball, you can spin it easily, side ways, or up down. Your hand can easily hover over the ball freely. For him, he preferred the Logitech Marble than the Trackman Wheel.
For full review, see: Logitech Trackman Marble Mouse Review
At first, you'd think that “Logitech Cordless Optical Trackman” is the best one on the market now. Big ball, 5 buttons, cordless, plus a scroll wheel! However, after reading reviews, this mouse has several problems. The ball doesn't spin as compared to the Logitech Marble, the buttons are hard to use, the scroll wheel is not much usable.
Logitech Trackman Wheel Review
For reviews of other brand trackballs, see: Best Trackball Mouse.Disqus