I am new to this kneeling chair business, so I am still getting used to the feel; my knees sometimes hurt a bit, but that is usually alleviated by re-positioning, to find the "sweet spot."Bought this for my work office, and I'm thinking about getting another for home.

However, I tried it at a few different positions (up a little bit, down a little bit), and my calves and my back hurt after I sat in it

Assembly was a bit tricky and required a sledgehammer and a drill to get one caster inserted.

Although it looks a bit odd at first, this chair is AWESOME

A bit annoying, but once you get it to where it works for