Just got this 24 hours ago but I had the best nights sleep I have had in quite a while.  I used to wake up during the night with sciatica pains and hip pains.  I didnt wake to any pain at all!!!!  Of course, I also got a memory foam topper to go on top.  Hope this mattress lasts me a while. We shall see!  So far so good though.  Will update if anything changes.