One benefit that I hadn't considered is the ease of putting it away for the winter.  RAther than leaving it in the yard to weather, we'll be able to pack it away in the attic as each piece disassembles and is very light.  Still sturdy enough when placed together to handle the sand (about 18 5# bags worth) and kids).  Thought it would be the perfect size for two kids to not get in each other's way, and it should be.  But human nature - the kids still play in the exact same spot with half the sandbox unused.  Maybe a barrier in the next version?!  The seats are a very nice bonus and the cover is very sturdy.  I didn't realize the cover would be a bit loose - they recommend putting an exercise-sized ball in the middle of the box to prop up the cover.  That way water drains off.  Good idea but we don't have anything similar.  If I'd known about that I would have suggested it as a kids birthday gift.