We have a Sleep Number bed that we have had for maybe 10 years or so, and it still works perfectly, and will probably last me the rest of my life. It adjusts perfectly for both my husband and myself, and I just check the air with the remote every now and then.
When the weather changes, it affects the amount of air in the mattress, just like it does the air in car tires, so we have to adjust for that occasionally.
I like this better than any other mattress I have ever had, except maybe my waterbed that had the tubes sectioned in it, so it didnāt wallow around like a regular water bed, and you could use it with regular bed frame and bedding. It was comfortable, and always warm in the winter and cool in the summer.