we have a king size mattress and boxspring, we put the bed together last night and i love the way it looks! looks much more expensive than it is and classed up our room. Only problem is we realized we were missing 2 of the small wooden support slats and the wooden support beams looked very flimsy, we slept on the bed anyway and this morning i realized the whole bed was bowing in the middle. I looked underneath of it and the 3 slats broke and cracked all the way down to the bottom and the wooden beams look like they are about to crack. i called Great Offer Stock and they are sending out all new supports and hardware but i feel it will just happen again over time. I read that someone just put their metal bed frame back inside and sat it on that, we may try this as well. So bottom line if you are handy and can add more slats this may work for you, or if you have a twin, full or queen bed it may be sturdier.