We love this bed frame!! We purchased this for a queen sized mattress and have put the mattress directly onto the slats without a box spring. The mattress fees comfortable directly on the slats but we may add a pillow topper later. The bedframe was easy to put together and looks great in our room. The one downside was that there were no pilot holes for the majority of screws. We ended up using a drill to get the bed together since screwdrivers were rough to use. Aside from that, It's a very study piece of furniture. There's a center support beam under the bed which is an added bonus. The center support beam isn't stained the same color as the rest of the bed, so buyer beware, if you can see the underside of the bed when you're away from the bed. The center support beam does have very study rubber feet and overall it's a great piece of furniture. It's just want we were looking for. Thanks Wayfair!