The Kensington Expert Mouse Trackball is like no ordinary mouse . I got this mouse as a gift. However, I did a Google search and this mouse costs $119.99. I, personally, feel that this mouse is over priced. I had expected this to be roughly 60 dollars. This mouse is nowhere near what I had expected.

Have used a trackball for about 12 years. I compare using a trackball vs a regular mouse to be like riding a no-speed vs a 20 speed bike. Wouldn't be without it. And you do get what you pay for. The last Kensington Expert Mouse I purchased (before this recent purchase) was in Jan 2000.

The Expert Mouse is great for those with limited movement, or lack of fine movement in their hands, such as my 81 year old father. The size of the ball and buttons make it exceptionally easy to use. HOWEVER - Kensington's drivers for Windows 95 and Windows 98 are simply abominable.

Since I wrote the reivew below, Kensington have *finally* released Windows drivers that work on my now Windows 7 machine. Original review: I bought three of these devices only to discover that Kensington do not support it with Vista drivers, meaning that only the bottom two buttons will work with...

they will take it back

not Vista compatible

The Kensington Optical Expert Mouse trackball mouse is designed to be an alternative to the traditional version, with the cursor controlled by a large weighted ball.

Yes, I would recommend this to a friend

Comfortable Design; Easy To Clean; Great Features; Highly Compatible; Quiet; Reliable Performance

I was so excited to see this trackball not only that it is wireless but also a new look, the red ball and black Matt color that it seems like something out of Star Trek, LOL. The Spinningwheel is not as smooth as my previous wired truck balls but I think that will just come with time and usage...

I use this without the wrist rest, it's a very comfortable mouse to use. The scroll wheel is a great feature. The software was easy to install on to my mac so you can then add functions to the extra two buttons, such as copy and paste.

To begin, this is the fourth trackball I have owned. The first two were the old putty colored ones I used with my older Mac's and were much better quality. The last two were both the newer model K64325 - dark grey.

The main reason I bought it is to relieve the wrist and finger pain I had from every other mouse and trackball, which it does well. It's easy to switch hand and finger positions to keep them moving.

large ball and buttons make use easy; My hand and fingers don't get cramped since it can be used in different positions

Scroll wheel is cheap and sticky feeling (may change when broken in?) but that's not so important to me anyway; The PS2 adapter was not in the box