Got this bed frame for my son.  He is 10, so I wanted to get something study.  The frame is all wood and so far is held up well with the abuse that a 10 year old can put on a bed.  We are not using a box spring.  We are using a full size memory mattress only and it fit perfectly in this bed frame.  The only concern I had with the frame is that there are only 3 slats used to hold the mattress.  I would have liked to had a few more slats just to put my mind at ease.  However, I have NOT had any trouble with the use of the 3 slats that were inclulded with the bed frame.  All and all this was a great frame for the money.  I would buy this again.