The only issue is if it's moved, I have to flip it upside down to 'straighten' it back out. It goes lopsided! But it works great when it's flat (and straightening it out isn't a huge deal). The main purpose was to get my kids something to jump on besides the couch, since that seemed to be a hidden passion of theirs. ;) They love to bounce on it, and so do it! Its a great leg workout. We're all happy for the purchase!