Title: Trackballs are no good
Product review: The Logitech Cordless Trackman Wheel has the following drawbacks, some of them endemic to all trackballs, some of them unique to this product:1. For _precision_ mouse movements (such as using AutoCad), using the trackman ball with your thumb is like balancing a plate on a pin--I would rather use a touchpad.2. At least in my office, the RF signal is "line of sight", so your receiver has to be within 2-3 feet of the device.3. Get an optical mouse instead; more accuracy.4. When the batteries run out, be prepared to navigate using your keyboard until you reinstall new batteries.5. Only advantage I can see is if you have very limited desktop space.
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