This piece was purchased for my in-laws.  It is so versatile that it can be used by "anyone".  Other family members liked it so much they are looking to get a piece for themselves.  Although the inside is hollow it is still sturdy.  The grandkids have been jumping and sitting on all portions.  Climbing inside and knocking the lids off.  So far it seems durable!  

Pros: No assembly, durable and versatile. 
Cons: none to note