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Title: Great product--I've worn the feet off of mine
Review: My wife and I both use these with our laptops and love them. It works with any computer that has USB, and has no batteries to run down, so it's always ready. I've had mine for 2 years, and am about to replace it because I have literally run the feet off of it--the little nylon pads on the bottom have worn down to the point that it sort of scrapes when it moves. I am surprised to see the negative reviews about the cord, because I have had no problems at all. You need to be reasonably careful when retracting the cord so that it doesn't bunch up, but it seems very sturdy. I carry mine in a backpack where it gets jostled around with a bunch of other gizmos, and it continues to work perfectly. I used to think a wireless mouse was the ultimate for mobility, but those have 2 problems: 1) batteries; 2) most of them come in 2 parts, so if you lose one, the whole thing stops working. This mouse has neither of those issues.
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