Thanks for the heads up Hickory ^. I knew they use a foam mattress but did not know much about the life expectancy of a mattress. The only thing my wife and I do know is that our own mattress has long since outlived it's comfort & all of those Marriott stays make us acutely aware of how deficient our own mattress is.

We'll have to research this carefully since one doesn't want to be running out every few years for a new mattress.

Barry