Price: $ - $
I was skeptical about using a trackball, but my wrist and elbow had gotten so painful I knew I had to try something. I was pleasantly surprised. It was very easy to get used to and comfortable to use. The buttons are programmable with the Intellipoint software so you can make this trackball totally yours.
Or at least you COULD... until Microsoft, in their infinite wisdom, decided to discontinue it! My husband loves mine... too bad I cannot find one for him, and I have yet to find another brand or model with the good features of the Microsoft Trackball Explorer.