Poor design, REALLY poor directions, but looks great once you get it built. As another reviewer encountered, the rail guide holes cause the rails to lay on top of a cam lock so I had to change the sequence of assembly a bit so that I could deal with it, BUT it was not easy. The other step that was tough was getting the hinge for the top piece mounted which took two people and some colorful words but finally got it put together. My son loves it!