I weigh 65 kg and used this mattress for about a month. HOWEVER, I could never sleep properly at night. I also had some pain in my lower back. I sent this mattress back and bought another one from Concord. The new mattress which therefore H2, but it what much better surface to sleep on. A little costly (160), but Certainly worth the money. Now I can sleep through the night and there is no pain. This mattress May Be Good For Those who like it a little soft but it is not firm at all. It definitely does not feel like a H2. My boyfriend who weighs 80 kg had even worse problems When sleeping on it. The quality looks good (we only used it for a month), but it is not firm as the product description says it Should be. Therefore I give it only 1 star for the trouble and back pain They Caused me.