After reading other reviews I was skeptical however it arrived in perfect shape (no corners dented) and when hung does not sag at all!  

BTW...From what I can tell, this is identical to the floating shelves sold at Home Depot just at better price...probably the same manufacturer.

Pros: Looks great. You cannot tell its MDF from just looking.
Cons: Cheap MDF which will dent easily if hit.  Nothing to hide the screws on the bottom.