Can stability balls really replace expensive ergonomic office chairs?

I’m a Certified Ergonomist, so I should know.

So I did a little research and here are a couple of articles that I found:

http://www.ergoweb.com/news/detail.cfm?id=2511

http://cre-premus.uwaterloo.ca/kn_stability.html

Looks like the scientific research says … no positive benefit.

But one of the people at our office swears by his. (Can you guess who it is?)

Anyone want to contribute their experience – good or bad? Leave a comment here.