select comfort predates the select number mattress

I have owned my select comfort for several years, I modified my water bed frame for it ( shortened the plywood base length, and drilled holes at the head for the air lines), after my water bed failed. the people at select comfort are verry helpful, and stand behind their product, even 18 years later. now that my legacy model, has started to leak air, they sold me replacement parts, including a new cover, to rebuild it.(minus the warranty depreciation). I see now, they are now offering a select number mattress as a direct waterbed replacement. that was not an option 18 years ago. but I am still verry happy with choosing my select comfort, it is the closest I've gotten to sleeping on water. plus, on the nights when I want a softer mattress, I can just let out some air, or add some for a firmer mattress