In the photo the bed appears to be the same size as a twin mattress. In actuality the platform is larger than a twin mattress. Leaving visible particle board face up. 

During assembly two of the predrilled holes were in the wrong spot. Holes has to be re-drilled in order to assemble the bed.

I might have sent it back but I had already disassembled the toddler bed it was replacing and bed time was looming for a two and a half year old so I proceeded with assembly. 

It looks okay after I added a bed skirt and dressy Pottery Barn bedding.  Next time I will not go by photos. I will look closely at the dimensions prior to purchasing. I made the assumption that something advertised as a twin would in fact fit a twin mattress.