The assembly was relatively easy.  It does however stink to high-heaven until you air it out.  We left it outside overnight, and by the next morning one side had a rust stain on the blue cover.  I don't know how that happened, but oh well.  My daughter likes it, and does use it frequently.  It is a bit small, so you must put it somewhere with at least 3 feet perimeter for safety.  I still recommend it despite the horrible smell.