The mouse had a pretty good profile, and it had a scroll wheel too, but it was trackball, and I'd prefer an optical for my next mouse. Plus the receiver connected into the PS/2 ports, not USB, so the mouse responsiveness was pretty crappy. Although I bet the fact that it was wireless had an impact too. So I didn't like the mouse much.
Still, for AU$50 it was pretty good value.
Of course, it wasn't ours to keep. It was for one of dad's customers, so it's gone now. Incidentally, it took some time getting it going with Win2k but it worked 'out of the box' with RedHat 9. Go figure.
I want a wireless keyboard now. Maybe a wireless optical USB mouse would perform better too.