I bought my BodyBilt chair 13 years ago. I love this chair! When we moved to a new building six years ago the college bought all new furniture. I tried to get them to buy me a new one, but they wouldn’t, so I fought to have the movers bring my BodyBilt chair to the new building. With my back issues, my favorite part of the BodyBilt is the tailbone cutout in the seat. I would never be able to sit for more than 20 minutes at a time without that feature. I’ve probably sat in this chair in excess of 4 hours a day for the last 13 years. That’s in the neighborhood of 16 thousand hours of use, and some abuse. This chair has gone beyond its 10-year warranty and still going strong. I recommend BodyBilt chairs to anyone who asks. I figure if I get 20 years out of it, the chair has cost a little over $50 a year.