The mattress is not cooling, in fact maybe the opposite and retains heat. Its way too hard for a side sleeper, I wake up in pain most mornings. My partner also has a lot of back pain when he wakes up. Want to return it but apparently have to wait till the 30 days is up and THEN try to deal with shoving the huge mattress that came compacted back into the box it came in and THEN be able to return it. Not worth it considering other brands will actually pick the mattress up if you don't like it. Also got the pillows which are way too soft, in the morning I wake up completely sunken into the pillows, so much so that it feels like there isn't a pillow there. I feel like the hassle of not being able to return it is what they rely on so people keep the mattress. Next time i'll have to do more research on return policies before I buy it.
At first I was worried because the bed isn't as soft as I was hoping it would be but after about a week I realized I was getting used to the firmness and was sleeping better than on my old memory foam with pillow top mattresses. You can't beat this quality for the price. Give it some time and you will love it.
We are both sleeping like babies... but still working on breaking it in. Super firm, but with some kneading, it's relaxing gradually. (not even a month set up yet) HIGH quality material, no weird smell, and was super easy to set up!