Took an hour to assemble, and we needed it to mount on concrete, which it is not meant for.  The arrow shaped corner poles were meant to stick into grass or soft material.  Had to saw off the ends and glue a mounting plate on the cement that the poles would slip into.  Seems like most people would be mounting on a hard surface, and they should accommodate that, then provide the arrow shapes as clip on's for soft mounting.  After completion of all these adjustments, it works good.  Lightweight.