Only giving 4 stars because I’m not sure if it’s because I don’t have my box spring yet but I took a 20 min nap on the mattress on top of my bed frame about 24 hrs after I let it decompress and there is a dip where my torso was laying. I’m 145lbs and was laying perpendicular to the mattress so it could be that I was just in a dip between the slabs. On another note, that 20 minute nap felt like a full night’s rest to me!!! The mattress is perfect and exactly what I was hoping for. It is a bit on the firmer side of medium but that was perfect for me. Hopefully that dip comes out