I had carpal tunnel surgery and have been using a different brand trackball with an EZSee keyboard for 20 years and have tried several computers during that time but my favorite trackball finally gave up. I bought the Kensington because of the price and because it was similar to my previous trackball. The design is a little lower than what I'm used to, but I adapt easily. I've been using it daily for a few weeks now and it hasn't given me any problems and I'm a writer (I work 4-6 hours a day on the keyboard. The Kensington is actually slightly faster than the previous one and rolls much smoother. almost slippery. Thanks for the good product, I'm looking forward to 20 years with it.
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