We have a few Life chairs at the hospital I work at. I wasn't too impressed - much happier with my Aeron at home and Knoll Bulldog at my own desk (sadly, discontinued). We also have a ton of Knoll Chadwick chairs, and they are terrible - remarkably uncomfortable and they started falling apart just a few months after they were acquired. At the moment you'd be hard pressed to find more than a few in the entire institution where at least one armrest hasn't broken off. YMMV of course.