Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325 by Kensington
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Digital camera reviews of Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325
Digital camera Review: A tennis-elbow blessing
Summary: 5 Stars
Overuse of computer mice over extended periods of time has significantly worsened my tennis elbow. At my wits end I have decided to give this mouse a try (I have tried many others as well and was about to give up). The reason I opted for this mouse is that I would be able to use it with either hand even though my non-mouse hand was completely useless with a traditional mouse. The large track ball on this mouse along with the large programmable buttons make this mouse the simplest to use. The integrated scroll wheel is unbelievably handy and very accurate. Gaining precision when using this mouse with either hand is truly simple. I can only encourage anybody with tennis elbow or other arm ailments to give this mouse a try. It really works!Digital camera Review: A trackball without peer
Summary: 4 Stars
Really, if you're looking for a modern trackball, you've no real alternative than the Expert Mouse Trackball from Kensington. It has flaws, if we had a more viable trackball market, this would certainly be a much different review. Yet, the market offers what it offers, and this is really the best of the crop. Four buttons and a scroll wheel with standard USB HID support, meaning that it will work without any special drivers on all operating systems. Note that Kensington's alternative 4-button trackball, the Slimblade, does NOT use USB HID for all its buttons and does not work properly without special drivers and does not work on all operating systems.
Furthermore, Kensington offers an outstanding 5-year warranty on this device. That is good because it is neither particularly inexpensive, nor is it particularly well-manufactured. Expect to use the warranty, I did.
Exactly a year from purchase (to the day), my scrollwheel broke. I received a new one in only 3 days. By the way, the problem is not mechanical, despite how flimsy the wheel might seem, it is an electronics issue. The scrolling happens through slits in the bottom of the wheel which cover/uncover an LED and a photodiode which trigger the scrolling mechanism. The failure of either of these diodes can cause failure in the scroll wheel. Fixing, then, is likely a simple matter of soldering; Of course, you shouldn't have to do this any time soon, given the 5-year warranty. Note that this design is why, if you balance the scroll wheel between "clicks" it will continue scrolling. I'm yet unsure how this design allows two-way scrolling.
Digital camera Review: A trick to make the trackball smooth
Summary: 5 Stars
Recently, I upgraded to this optical version of expert trackball. Just like other reviewers' experience, the trackball was not smooth at all right out of the box. Yet, instead of trying to let it break-in after a couple of hours' usage, I took the ball out and rolled it between my hands for a minute. Then I put it back into its place. And it's as smooth as the old mechanic Kensington trackball I was used to. It's that simple.Digital camera Review: Absolutely perfect
Summary: 5 Stars
Of course Kensington makes a great product, but the flagship is well worth the money. I have had other trackballs and even other "expert" mice. This one is by far the best of the best. I look forward to years of great use. Go buy one!Digital camera Review: After 13 years of use, I still love this product
Summary: 5 Stars
I rarely write reviews, but after cleaning my trackball, I realized how integral this amazing piece of technology is in my daily work life. I started using the old original 4 button white trackball when I worked for Kensington in San Mateo (13 years ago). It took a few days to get used to it, but once I did, I knew I could never go back to a mouse. Very comfortable, versatile and durable. Coupled with a Microsoft Natural keyboard, I can work at my computer all day and have very little fatigue (including a break every 40 minutes).