we bought this matress about a month ago, my husband is 6'4" i'm 5'3". He loves it has no back pain ever and sleeps better then ever. its hard as a rock for me i have constand upper back neck and shoulder pain cannot get comfortable at all. its like i cannot ever sink into the memory foam. i was more comfortable on our 6" foam matress from ikea ontop of plywood then this thing. i wake yp and all my joints ache. i'm not super skinny or anything and most nights i literally have my husband push me down into the matress. so if you are lighter then 125 dont buy this if you are a larger framed person you will love it. i'm looking at a replacement now.