Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Does it REALLY keep you cool?  im desperate for nighttime coolness...
Document: Mattress is very comfortable but be aware, when first getting on it, it feels REALLY hard and firm. After about a minute or two, it'll form to your body. Also keep in mind the mattress is much heavier compared to comparable sized standard mattress and once out of the box, impossible to 'compress' again and difficult to move.
It has been extremely comfortable the first two nights.As far as feeling &#8220;hot&#8221;, I have yet to notice anything. I am an extremely hot sleeper! Although we have central air, I have an additional window AC unit to cool the bedroom to 64F or even lower for nighttime.
I like having a little airflow around my body. Im not sure why the manufacture couldn't put little Do-nut holes in top foam to improve this but it hasn't been a problem yet for me. They do include air vents in the cover over the foam, and the info that came with it says the top foam should vent well stay cool. I'm not sure how as it seems solid which is why I ordered the mattress cover that has good ventilation.
Im not as thrilled as I was in the beginning. I had to buy a " cooling" mattress pad to keep the temp down. It did get a bit warm. Also, it seems to be sinking in the middle. definately has broken down in just 2 yrs. going to put this on the guest bed and shop for another mattress that will last longer.
Just to keep it fresh and clean, we purchased a bamboo mattress cover. A few people mentioned it slept hot, but I agree with most others that the bed is fairly cool (I sometimes feel a tiny amount of heat, but it's summer in Florida, so this is no big deal. I just roll over to a cooler spot).I think we were both surprised that the product lives up to its amazing reviews.
I have waited a few months to review this. So many reviews on Amazon seem to be first impressions rather than experienced.It took me a while to decide what thickness to buy. In the end I read reviews at [...] and decided that the most happy customers appeared to have the deeper mattresses.It takes a little getting used to. We keep the bedroom cool, so when I first crawl in it seems a bit stiff.
I love this mattress! The down sides for me, although small, are that it's a little too cool and just a tad too firm. However, it is winter in Oregon and we keep the heat fairly low so I expect in summer it's going to be great. I actually bought an additional Sleep Innovations pad to put on top of the mattress, and now the firmness level for me is perfect. I like a cushier mattress, and with these two S.I.
I bought this bed a few weeks ago. So far I love it. I didn't find any problems with it being too hot like some other people posted, even though I tend to generate quite a bit of heat. I do keep my room pretty cool though, so I know that helps.It did have that weird smell at first, but that went away in about 2 days.Before this bed, I had quite a bit of bed-related back pain.
From all the other buyer reviews I read on Amazon, I expected better. It's REALLY firm so if that's what you want you won't be disappointed. For the price it's not bad but it's no Tempurpedic.
This is REALLY hard. We have a full size one of the same brand and it was so great we ordered this one. They are NOTHING alike. The queen size is like sleeping on the hard floor.
Answer: I was was nervous about sleeping on foam for the first time.  But once I did, the issue with heat has never been a problem.    I have had this been for 8 months now, and it been great ever since !