While I do not consider the PowerMate an essential device I find it is an excellent complement to the scroll pad on my laptop. Scroll pads are great pointing devices, but no so great when it comes to scrolling. The PowerMate has a great feel and is very precise, excellent for navigating through long docs. The finish and build quality are excellent. My one wish is for a better driver for Windows XP. When my laptop goes into hibernation, the PowerMate does not wake up with the rest of the system and I have to unplug/plug it back in. An updated driver is available for the Mac, but no update appears to be in the works for the PC.
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