Need a new chair for university, since the one I have over there has no back support.
Kneeling chairs seem a good idea since I'd actually be able to stow it under my desk and they do seem comfortable... but are they comfortable for long periods of time?
Well the chair at uni is absolutely knackered. The back support is totally gone and it feels like the seat itself might topple off the support. I imagine you wouldn't need a back rest with your legs in the tilted position of the kneeling chair.
I used a kneeling chair because I have back problems. I really liked it and want to get another, the wheels on my old one broke.
It's not comfortable for long periods of time (like for hours at a time), but no chair is unless you're pulling up a recliner to your computer desk, lol. And you shouldnt be sitting in chairs for long periods of time anyway, get up and stretch.