Title: Bad Configuration, Bad Construction
Product review: The construction of this trackball is just dismal. The buttons rattle like crazy as you click on them, and the ball itself sticks as you try to move it. (i.e. it has a lot of static friction) This seems to be caused by the fact that the ball just sits in a plastic socket, as opposed to other brands where the ball rests on hard "ruby" contacts (logitech) or on steel rollers (some of the kensingtons).Your thumb is not nearly as dexterous as your forefingers, since it has evolved primarly for clamping purposes. I would recommend any finger operated trackball over any thumb operated model.In any case, don't buy this unless you are going to rip it apart and use the parts for a project.
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