@mwichary compared to modern optical mice, no. But compared with the ball mice of the time, absolutely. The main advantage was that they didn’t need cleaning (aside from the occasional wipe down) and didn’t degrade as badly over time.

@mwichary
and the underside is even more insane than the top… did you get a photo of it?

@mwichary if I had a pound for every time someone in our university computer labs grabbed one of these mice the wrong way round and momentarily thought they were having a stroke… ah good times