To begin with this seemed like a ideal gift for my young son. However, it now seems to let you over-inflate the chair when you top it up with air. Very annoyingly, it seems to disporportionally inflate the chair when you blow air into it. For example, the back of the chair over-inflates so it is very awkward for my son to then sit in it, whilst the arms of the chair are not inflated enough!! The signs of a cheap product - a waste of money as only used it for <2 months before problems occured.