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Title: Expert Trackball
Review: I love this trackball. The large ball makes movement smooth and effortless. Once you program the four buttons and the movement rates (very easy to do) you will never go back to a regular mouse. The one drawback to this trackball is the slow response with the scroll ring. You have to move it several times to go from top to bottom of a page. It is rather jerky compared to Apple's Mighty Mouse. It will scroll only vertically. If Kensington can come out with a single button horizontal/vertical scroll on this trackball they will have the perfect mouse.
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