It is not easy finding a good mattress for someone who experiences back pain and sleeps on their side, but prefers a mattress on the firmer side. The Koala Mattress PLUS PolarBands provides such great balance and customization that I was able to try out both sides to see which firmness level I prefer. It also felt easier to stay asleep all night without feeling too hot, which must be thanks to the PolarBands. Overall, highly recommended and worth the upgrade!