Ive had this mattress along with an adjustable base for 1 month now, and I cant say enough good about it. Its the best bed Ive ever owned and for the 1st time in 15-20 years, I havent woken up sore and achey. 
I notice the relief most in my hips, shoulders and knees, as I dont have back issues. I feel like the mattress is the right combo of firm and supportive, with some give. Also I appreciate that it doesnt sleep too hot. Its fairly cooling. I bought my son one as well after trying mine.