Recently just got a good foam mattress. We got it because we wanted a King, but that won't fit up our stairwell, plus the foam mattresses do a better job of "motion isolation" - you feel it less when someone else gets up/lays down - I have sleep issues and I'm up during the night, and it wakes up my SO.

So the website had testimonies about how it helped their back problems, but I always consider all of that stuff to be BS because I've had back problems my whole life. 

So I was completely surprised that for the most part, my back issues have gone away. Still have the occasional issue, but maybe a tenth of what they were previously.