Negative Positive
Title: Trackball a good, but not thumb trackballs
Review: I've been using trackballs for decades now, but this was my first thumb activated trackball. I suppose they are fine if that's what you are used to, but I hated it. It just took too much effort to move the pointer across the screen. Not to mention that with a normal trackball I have three fingers I can use to move the trackball instead of just a thumb.
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