A few nights in and we love it so far! We got the king size and I was able to put it together in about an hour- despite being 9 months pregnant.  I underestimated what not having a box spring would do to the height of the bed, but it’s not all that much lower.  I would disagree with the answer listed above that you can put a box spring on and a mattress- too much of the headboard would be covered.  Great purchase for the cost so far, and quick shipping!