The particle board used is low quality and not sturdy.  The joints and screws came apart within a few months of moderate use. Two supports broke and we quickly moved it to the garage since the sharp screws were popping out. Our < 2-year-old is not huge by any means and did not abuse it. 

When it originally arrived I could tell it was lower quality than I expected the joints were bad, but I decided to give it a shot anyway. I regret that decision and wish I just returned it.