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Title: Lots of thumb
Review: At first using the trackball took some getting use to. Maybe about a week but afterwards once you get the settings to where you like it is pretty easy to use. My biggest problem is training my hand to relax on the side of the trackball instead of holding it like your normal mouse on top.It is not as precise as the trackman marble mouse, I guess because the ball is bigger. And the first couple of tries on the trackman wheel your thumb starts to get tired. But having the scroll wheel is a plus.But after you get use to the wheel it is pretty comfortable.
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