I am a back sleeper and I had been experiencing pain on a daily morning basis with my old mattress. I am thrilled with the essential casper. After the first night's sleep I noticed I no longer had neck pain. After the second night's sleep and since then, both neck and back pain had stopped. So far I don't find it to be a heat trapping mattress. I will of course update this review anything changes or unreasonably degrades, but hopefully it won't. I use this mattress with the casper foundation to hopefully ensure longevity. I will also say do your research. Some people with various sleep preferences (side, back, stomach) and different body weight might/might not like this particular mattress. YMMV.