I was afraid it might too flimsy to put another truck of heavy winter blankets in spaces bags (very heavy) on top of.  No need to have worried. It is just what I needed to store my guest room.  Inside I have a Queen size air mattress, two pillows, a quite, mattress pad, sheets, a body pillow and a foam pillow wedge for sitting up in bed.  Wow!
Now all the soft stuff are in vacuum storage bags to get it in. But boy is it heavy.  It took being moved around a lot while I finished decorating the room, so it can take abuse.
In the top trunk is a mattress topper.
Cant beat have a guest room in a box! 
Perfect for my little house with its little bedroom and little space.