I've been using trackballs since the early 1980s (that was a custome-built thing attached to a DG Nova, but still). Can't go back to a regular mouse. But yeah,

I've been using trackballs since the early 1980s (that was a custome-built thing attached to a DG Nova, but still). Can't go back to a regular mouse. But yeah, I don't see what this does that my current trackballs don't do, or at least that I would ever use. And it looks really awkward to use. I also don't really care that much about the half-second it takes to move my hand. I don't touch-type or type nonstop. So practically that means nothing to me.