Just arrived. The quality of this is very good; it is sturdy. The trundle glides straight back and forth- no jiggling.
I plan to order a 10" deep twin for the upper and an thinner 8" deep for the lower bed.
This will require some big pillows for lounging.  
This has to be propped agains the wall ans the lower pertion of the back is open.  This could not float in a room.  
I like it!