Very well built frame and they even included a little ratchet tool to aid in putting it together.  The build instructions are a little confusing but not bad.  The only item that I see as an issue is that they use double sided sticky tape on 4 of the cross supports to keep the mattress from sliding around.  A better design would have been to use adhesive rubber strips because if you ever plan on changing or flipping your mattress that sticky tape is done for.  All in all it is a very nice bed frame and seems to be very sturdy and well constructed.