Negative Positive
Title: Not worth the money, better spend your money on good mouse!!!
Review: Low Quality control, scroll wheel is not good, scroll wheel is not smooth, it's rough almost all around. My intention was to use this trackball with drafting program like Sketchup and ACAD but turned out that I am missing a middle button, so I had to program one of the 4 button for that function but it does work well like the middle button on the scroll wheel of a mouse.I would not recommend this trackball.
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