Editorial Product Review:Item Description:The best trackball ever made has just gotten better. Designed for PCs and Mac's, the new Expert Mouse employsKensington's Diamond Eye optical technology for smooth, precise cursor movement. Surrounding the ball, Kensington has a brand new implementation of its award winning Scroll Ring that puts scrolling right at your fingertips. More comfortable than ever, the Expert Mouse even comes with a soft new wrist rest-right in the box! You get all of these great new features along with the same, large ball, exceptional control, and ease-of-use that has set the industry standard for more than 15 years.
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Buyer Reviews
Average Buyer Rating:
-
GREAT FOR THE DISABLED TOO
SINCE MY HANDS BECAME CRIPPLED, I HAVE NOT BEEN ABLE TO USE THE STANDARD MOUSE--OR EVEN THE THUMB OPERATED TRACKBALL MOUSE-- BUT THIS CONFIGURATION IS A BLESSING! I CAN EASILY OPERATE THE TRACKBALL AND CLICK LEFT OR CLICK RIGHT WITHOUT THE BENEFIT OF AN OPPOSING THUMB. THAT LARGE SCROLL RING MAKES SCROLLING A SNAP AND THE FACT THAT THE MOUSE IS STATIONARY ADDS TO IT'S EASE OF USE EVEN FOR MY PAL WHO IS NOT DISABLED. AN EXCELLENT TOOL. THANKS!
Customer Rating: 
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disappointing
I bought this product because I was suffering from repetitive stress injuries from using a mouse. Initially, I was ecstatic with this trackball. The interface is slick, the ball works well, and the scroll wheel worked superbly. But about 6 months into ownership, the scroll wheel stopped working. I contacted Kensington and they sent me a replacement for free. I figured it was just a freak incident. I was so pleased with this $99 trackball that I bought a second one for my work computer. Six months after purchasing that one, the scroll wheel died. I asked for another replacement and they sent one for my work computer. It's now about 6 months later and, surprise, surprise, the track wheels have both died again. I'll probably contact Kensington again and hope they'll send new replacements. But I'm definitely not going to recommend this product to anyone else. If the scroll wheel held up, I definitely would as everything else about it is great. But there is something wrong with the design of the scroll wheel. If that's an important feature to you, just be prepared to replace this every 6 months. I can't believe this is just a fluke when 4/4 have had the same problem.
Customer Rating: -
Best Trackball Bar None
Simple and elegant - this is the best trackball out there, and I've tried many. I have bought many Kensington track balls over the years, and I have 4 of this model or my various machines. It is easily the best combination of ergonomics, solid performance, quality of build, and usability.
And their customer support is second to none.
Do your wrist a favor and use this instead of a mouse!
Customer Rating: 
-
Good design, needs Vista drivers
I was terribly disappointed when I tried to install this trackball on my Vista laptop. There is no driver for Vista, which meant that I could not program the buttons at all, and 2 of the four had absolutely no purpose. So, I returned it. On the good side, the design is quite comfortable (I am a woman with smallish hands but long fingers), and I love the placement of the scroll ring. If Kensington writes a Vista driver, I'll get another one, but until then, my hunt continues.
