It's just few days since I started using, I need more time to evaluate and validate other promises such as lingitivity and continued comfort. I hope if tn works for me for one year I'll give 9 and if it works for me for two years I'll not hesitate to give 10 because I would feel that I've recovered my investment in the mattress.
Shipping was super fast, unpacking was easy and the bed is incredibly comfortable. I have gotten significantly better sleep in the two weeks I have owned the mattress.