Purchased for my after-school K-6 tutoring business as a seating option for my students. My "wiggly, bouncy, can't sit still for a minute" kiddos enjoy sitting in the Christopher Knight Ball Chair. Seems to be durable. I chose this chair because the base legs were wider than the ball. Overall, the assembly was easy, the directions were clear, the product is safe, and my students are able to concentrate on learning.
