The slats were bowed upwards, we have had the mattress on the frame for a few days, and we are still waiting for the weight of the mattress to lay the slats flat. Additionally, we have a queen mattress and ordered a queen frame, but the frame is too large by a couple inches on every side. We can see through the slats to the bottom. Not a problem when the covers are on and hanging down, but when the bed is unmade, it is obvious. I do love the color and look of the frame though, which is why we are keeping it.