I've heard mixed comments about Tempur but tried it myself at my sister's place, did not turn the aircon on and didn't feel hot though. Really feel the mattress contouring with my body, especially when I sleep on my side, the feeling is very shiok cos don't feel any pressure on my shoulder. The thing is I heard Tempur is manufactured and imported from Denmark, whereas most of the well known brands like King Koil, Simmons, Sealy etc all mostly from ASEAN countries, and are mostly similar (spring based) just that they change a little bit of the products here and there and call them different models and pricing. I guess it's a personal choice so it's still best to try it yourself and not just hear from others.