[Krasnol]

I love the Ergo. Bought two (in case they stop selling them at some point) and forced my employer to get me one (for H&S reasons). I've been using the pointer finger track ball for years but this feels so much better.

Also it's good for people with big hands.

The only downside is the rubber downside of it. It got unstuck so I had to glue it back onto the metal part. They really didn't think much about that.