Wonderful bed and sturdy! We read many reviews about mattresses sitting not right, which concerned us at first, but upon putting our mattress on we noticed that there is only about a 1 inch gap on either side, which is not bad as we use that gap to tuck the sheets under the mattress so they aren't hanging over the sides. Amazing thing about it is it also comes with full set of rails!! Many beds don't and you have to figure that out on your own or they come with a flimsy set, but this bed comes with a full, sturdy set.