I am a bit like the princess and the pea. I'm very sensitive to mattresses. My hips and back will be very sore after about 6 hours in a bad mattress. So after I broke my back ... I needed to be sure to have a good mattress. We had a waterbed when we first got married an later had various basic good support pillow top mattresses. We tried the sleep number an sent it back after just a few days. Hated it. A doctor mentioned the intellibed so we looked into that. Got the dual adjustable mattress
And have been sleeping well on it for the past 7 years. I found that sleeping slightly elevated helps me not to snore and lifting the foot of the bed takes the pressure off my back.

I had my king set for about 2 years and it is not wearing good , I am not a big person and it is slopping on the sides. I do not know what to do. It is not as good as I thought.

10 years ago i bought an intelliBED topper to put on my firm innerspring mattress. It helped my wife's spina bifuda so much I then bought a deluxe mattress set four years later. Both the topper and mattress set are still like new and sleep so well that we miss them when we travel and stay in nice hotels. No tossing & turning and no aches and pains....just deep, restful sleep when we're home and we can sure tell the difference when we travel.