Not first hand, but my co-worker had to give up hers because her fiance hated it. He gets hot when he sleeps and feels that the memory foam retains a lot more heat. She agrees that it holds heat, but she finds the heat cozy and comfortable.

It's not something I'd noticed while shopping since I don't usually lay there long enough to notice somthing like that. Just thought I'd mention it as something to think about.

(I didn't realize they don't require box springs... but wouldn't they require some support so you'd have to have beds with platforms? Can't you put any type of mattress on a platform bed and not use a box springs?)

assuming you are talking about the springback mattresses made of foam that go on top of a mattress:

my daughter and mother have them and LOVE them. I think they tend to be too mushy.

There's a lot more to know about memoryfoam, and foam mattresses in general, than is hinted at in this post. I suggest that you check the forum at the link and read some of the back posts and reviews for a wealth of information. I have a memoryfoam mattress. Regarding the heat issue, yes it exists for some people. I sleep hot on my mattress sometimes. It's an issue with body temperature, but the mattress definitely contributes. In my case, the problem is not constant, and I like the feel of the mattress and the sleep that I get on it. I'm still working with padding material to help the heat issue, and haven't found a definitive solution yet. Foam mattresses can be used on many types of foundations including plywood and platform beds with slats. Again, there is discussion of this on the linked forum. If considering a foam mattress of any type, I would stongly recommend one of the reputable internet companies, rather than buying the outrageously-priced T brand. Good luck, STeve

Here is a link that might be useful: Whatsthebestmattress

emory foam mattresses are designed to give all those conveniences, which you can demand for. It is made of special high-density foams. You may wonder why memory is attached with the mattress. The reason is the super soft high-density foams gets squeezed with a slightest of pressure put on it and takes a longer time to get back to it's original form or size. For this reason if you lie down on the mattress and get up after some time, you can see your body impression is imprinted on the surface, just like a stamp impression. So we can say that the mattress has a memory, which records the body pressure.

Here is a link that might be useful: Memory Foam mattresses

Memory foam mattresses are designed to give all those conveniences, which you can demand for. It is made of special high-density foams. You may wonder why memory is attached with the mattress. The reason is the super soft high-density foams gets squeezed with a slightest of pressure put on it and takes a longer time to get back to it's original form or size. For this reason if you lie down on the mattress and get up after some time, you can see your body impression is imprinted on the surface, just like a stamp impression. So we can say that the mattress has a memory, which records the body pressure.

Here is a link that might be useful: Memory Foam mattresses

I sell mattresses and switched to the "T" brand this summer. Its a great improvement. It is warm. To me its no big deal, if I'm too hot I take a cover off.

I generally do NOT recommend going with another maker. Every other brand I've investigated (Sealy, Dormia, etc) does not make their own memory foam, but instead buys it preformed, cut and boxed from China. So if you buy a Sealy for example your paying only a few hundred less for a product that Sealy had no hand in making.

If you're not buying a real brand and going with an internet discounter, then you really don't know at all what you're getting and any warranty will only be worth the paper its written on.

Tempurpedic owns the factories and makes their own foam. Its all done here in the U.S. Their product sold in Europe is made in Europe by them in their own facilities. They are the only ones with appropriated quality control and accountibility.