My previous mattress was a Simmons water tube bed. I have begun to toss and turn all night the past few years and developed lower back pain in the past year. When I got this mattress I was very excited because it was a firmer mattress but still soft on the surface. After sleeping on this mattress for a little over 2 weeks, I have discovered that I do not toss and turn as much, I am able to sleep deeper and my back pain is much improved! I do not really have any complaints with this mattress. Thank you so much Serta!!