This is a well design, solid piece that is good for any kind of mattress, including foam. We needed 9" in height to work with our bed skirt, and this delivered. Assembly was easy. Some reviewers complained about the wood slats sliding around. That seems impossible. Our slats were full length and fit tightly on the side ledges. Furthermore there are Velcro strips along the support ledges to prevent sliding, and a foam rubber strip running the length of the center support bar that also prevents sliding. A great product.