I’m giving it a five because the quality is still good but I think this mattress is not compromised of different layers as displayed here, instead it’s one big foam. I’ve felt for deviations and there weren’t any, unless the top layer is what’s preventing the ends of the mattress from reaching a full 8in. I like the zipper cover it’s well made and when I laid on it it instantly formed to my spine, it did feel nice and cool. Just got this delivered today on Mother’s Day for my son’s room.