Hi okada,
Thanks for taking the time to share your comments and feedback about your new Nano 2 mattress … I appreciate it.
While “comfort”, firmness, and PPP (Posture and alignment, Pressure relief, and your own Personal preferences) or what “feels like” luxury" are unique to each person and a mattress that one person sleeps well on may be unsuitable for someone else to sleep on … your mattress certainly uses high quality materials and components and there are no lower quality materials or weak links that would compromise the durability or useful life of your mattress.
Once you have gone through the break in and adjustment period (see post #3 here) and you are sleeping well without any discomfort or “symptoms” over the course of the night or when you wake up in the morning … then because of the durability of the materials and components it would be reasonable to expect that you will be sleeping well for many more years to come.
Most importantly … congratulations on your new mattress 
Phoenix