This bed offers 2 flimsy support bars in the middle of the bed, the first of which kicked out when I put the mattress on top cracking the main support bar in half. The second one eventually broke off as well.  We couldn't sleep out of the box so I ended up ordering metal slats for the bed which seemed to work for about a month and now the slat runner bars on the inside of the frame are being pried off. Everything is made of soft wood, this frame was not meant to be a king size.