A Sleep Number never gets sags or soft spots.
My 1st one is over 15 years old and was getting a bit worn.
We purchased a new one and took the old one to my place in Arizona.
I installed a new Egg Crate foam pad in the old one and it is as good as new now.
The new one we got a half split bed so that we can raise and lower our individual sides interdependently if we choose to we also got the heating and cooling function as well and in the winter the heating is great.
There is are several models to choose from and we took the middle ground and have been very satisfied with our Choices
