Gave this our best shot for 4 1/2 months…unfortunately after the 100 day trial. I’ve had 2 back surgeries, the last S1-L3 fusion. I also sleep hot. I thought this mattress would give me the support for sleeping on my side plus keeping me cool, but neither holds true. I toss from one side to the other after a couple hours of sleep, every night. I have not slept through the night since receiving this mattress. I wish we had spent the extra money for another Tempur-Pedic.