Do kneeling chairs help?

[mmglobal]

I tried a kneeling chair and never found it comfortable enough... problem is with the way it makes your knees feel... not your back.

The staff in the back section of the alphaklinik all use stools that have wobbly seat tops. (Maybe someone can look online for these types of chairs and post here.) They do the same thing as the knee chairs, or using a swiss ball as a chair. It forces you to constantly stabilize your upper body and does wonders for your lower trunk strength. Based on what I see at the klinik, those chairs also makes you look like a super model.

Mark