I just recently learned about this so thought I'd try it. I was still a bit skeptical, but when it arrived I was positively surprised. It seems quite sturdy, and we used the pump and we all tested it out. It's fun to stand on, and always realized a 7 yr old is way more balanced than us adults. We did buy it for him to use on his chair for doing some of his reading/schoolwork. He even uses it to sit on the floor. He loves it, and likes to sit on it and stand on it, and when he's upset, he likes tSee full review