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59 of 63 people found the following review helpful:
2.0 out of 5 stars
A letdown for a loyal Kensington customer, September 29, 2003
I have been using an Expert mouse for 7 years (and a Turbo Mouse on my Mac before that), but finally the left click button has expired. I decided to give this trackball a try since it was an optical.It is well made, and has a nice heft. However, I am disappointed for several reasons. First is the ergonomics. The ball is significantly smaller than the Expert Mouse's, which is makes precise control more difficult. But more significantly, the relationship between the trackball and the buttons is poorly done. When I positioned my hand for optimal trackball control, I found it difficult to double-click quickly and would have to move my hand again. The buttons need to be more towards the user's wrists. But the biggest complaint is the stalling, reported in a previous review. I don't think it's dirt--I think it's the pattern on the trackball. There is a cool pattern of silver and black swirls, except at one spot. This spot is black, patternless area about 1/2 inch (1.5 cm) in diameter, and I think the optical sensor has difficulty in picking up movement in that area. Every time it stalls, I look at the ball and note that this area is over the sensor. Microsoft optical trackballs are completely covered with a dense pattern. Yes, it is only 1/3 the cost of the Expert Mouse. But all these complaints aren't a reflection of its lower price, but rather, design flaws.
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