Kensington 64325 Expert Mouse Optical USB Trackball

100% of the reviews on Amazon.com give this product a positive rating.

Easy to use, easy to program, good number of programming options available to the user; use of trackball to scroll was great. Great warranty on the product

The one problem that I had was with the Scroll Ring, just could not find a comfortable movement to make scrolling as good as it is otherwise

the scroll ring took less than five minutes to adjust to, its amazing. comfort pad is kindof nice. good for casual computer scrolling and clicking

the angle is wayyyy too steep, I have to pitch my wrist at such an awkward angle to operate the overly large ball. Since the wheel is so large, it is not nearly easy to control as a more nimble smaller one. I often find my myself pushing the ball with...

Precise in a way that no normal mouse ever can be. Smooth and precise scroll wheel. Very high quality, I have been using the same trackball since 2010 ; Much less stress on your hand than a normal mouse

Requires frequent cleaning, it even needs to be taken apart from time to time to keep it clean

Precise in a way that no normal mouse ever can be. Smooth and precise scroll wheel. Very high quality, I have been using the same trackball since 2010 ; Much less stress on your hand than a normal mouse

Requires frequent cleaning, it even needs to be taken apart from time to time to keep it clean

I used the basic orbit for the past many years, and only ordered this because the buttons finally wore out, using this is a blast compared to it with the added four buttons being remarkably handy and the scroll ring allowing me to play the games I...

I found it awkward using at first due to it's design choice, and after reading a review stating the cushion it comes with for the wrist was rather bad I see why now, it attatches with two pegs that hook beneath the mouse, the pad isn't quite properly...

I used the basic orbit for the past many years, and only ordered this because the buttons finally wore out, using this is a blast compared to it with the added four buttons being remarkably handy and the scroll ring allowing me to play the games I...

I found it awkward using at first due to it's design choice, and after reading a review stating the cushion it comes with for the wrist was rather bad I see why now, it attatches with two pegs that hook beneath the mouse, the pad isn't quite properly...

Bought in December 2007 and it still works well

The scroll wheel movement always felt a little gritty; I just got used to it

Bought in December 2007 and it still works well

The scroll wheel movement always felt a little gritty; I just got used to it

none

I don’t often make comments derogatory about the service at Newegg ; But I ordered the Trackball on Apr 17 2015 late that night. I ordered 2 day redelivery but I hear anything until Apr 22 2015. I had to buy one on the week end ; Severe is severely...

I've been using one of these for over ten years - yes, the same one! They are built like a tank, and once you get used to one, you will NEVER use a mouse again. This is simply the best pointing device ever made, period

Expensive - but you get what you pay for