The slide is at least 9 feet tall and my 3 year old loves it. And my 9 year old niece loves it too. The only problem is that I weigh 140 pounds and when I go indoors to look after my 1 year old I tend to sag because I'm too heavy. I can climb up and slide down, but the top tends to tilt when it's heavy. We just lean it against the wall inside and that solves the problem. I'm not sure how it will perform on the outside, but it was a lot of fun being on the inside. It also sounds like the pinholes are leaking once we blow them up, like air escaping from the seams. but that's not enough to send it back.