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Title: The BEST mouse I have ever used..!!
Review: I agree that this "trackball" takes a little getting used to...however...it is the best mouse I have ever used..!!.....It is not for gaming unless you have very fast fingers but for everyday computing it is great. It saves on the wrist and arm and is very comfortable to use. I have had mine for at least 6 years (more like 8) and other than cleaning and replacing the batteries (2 AA) a couple of times a year it has proved faultless.I plan to buy another computer soon and will buy another mouse and keyboard then, if for only the fact that I want a new one to go with the new computer.BTW...I have had a DELL for @ 10 years and it too has been very reliable. I'm replacing it so I can have more speed and features.The Logitech keyboard I bought with the trackball and it, too has performed flawlessly. Both the mouse and keyboard are cordless.I'm on the computer 5-8 hours a day.....I highly recommend Logitech...
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