Well I've been sleeping on the Polysleep for awhile now and I will say that the back pain I was having has improved significantly. It does feel a bit firm and I feel it could be a bit softer but maybe that firmness is needed to keep the spine aligned . There are a million of these mattresses popping up on the internet these days and I wonder if I could get the same support with maybe a bit more cushioning effect I don't know. Will give it another month to settle in and then decide if I'm going to keep it or try something else as they all offer a trial period . If it was a little more softer on the shoulders I would say its a keeper but we will see .