This blows about and collapses all the time. The poles are supposed to 'rest' in a loop at the bottom of each corner, but they just keep slipping out, causing the whole thing to collapse. One side fully opens, but the other doesn't, and has a 'ledge' to step over, which the kids just kept tripping over. Big fail. Good point - arrived within 24hrs.
This item arrived very promptly the day after I placed the order. I haven't opened the box yet because it is for a birthday gift, but the box and packaging are in great condition and I'm looking forward to playing with it, I mean giving it to my nephew to play with, very soon!