I bought one a couple years ago - and by the sounds of it I got ripped! Mattress was £350!!! That said, it is nice - couple of years on it and it's still perfectly flat; no sagging (and I'm a fat bastid too ). It's firmer than I'd normally go, but I very quickly got used to it, and prefer the firmness of it now to softer mattresses. The only bad thing to say about it is in winter it's cold. The memory foam doesn't really get affected by ambient temperature, but it does react to body/contact temperature. So in winter, when the room is about 18-20 degree's, the mattress os cold when you first lie on it, but it quickly gets up to body temp (well the bit you're lying on - the rest stays cool). Which is great in summer tho, as the rest remains cool till you lie on it

Otherwise, I'm happy with it. Comfortable, supportive, cool in summer, tad cold initially in winter, but it's SOOOOO HARD to get out of in the morning as it's warmed t body temp and you're so snug lol

Best bit about it is that the rest of the mattress isn't affected by the area you're lying/sitting on. It's quite "dead", in as far as if I tossed my laptop onto my sprung mattress it'd bounce quite a bit. Toss it onto the mem foam one and it barely bounces even once - all the movement is absorbed. Seriously you can have a pint glass of water on one side of the bed and lie on other other and even when you move around, the pint doesn't spill!!! The advert I saw on TV showed this and I didn't believe it so I tried it and it's true!!!!!