I purchased the 12 pair (3 boxes) to replace my sneaker boxes.  Boxes need to be assembled, but that was not difficult nor time consuming.  For proper balance, placed some cardboard wedges underneath.

Pros: - not super sturdy, but strong 
             enough to hold sneakers.
           - easy to organize.  
           - neater look. 
Cons: - does not accommodate mens 
              10.5 and up. 
            - minor issue with door handle
               which was inverted.  An easy fix 
               was to pop off the door and  
               revert the handle outside. 
            - website photo is misleading     
               because hi-top sneakers have   
               to be placed in container side
               ways.