We bought this for my son for his 3rd birthday and opened it about a week before his party- he uses it every day!  We inflate it in his playroom and he bounces for hours at a time.  The kids at his party all enjoyed it too and have all asked to come back to bounce again.  We couldn't be happier overall.  The only negative thing I could say about it is the Velcro strip at the back of the bouncer leaves a bit to be desired- it opened up when my son's friend bounced into it causing her to fall out.  I think I may stitch the whole panel up as the kids all enter and exit via the slide.