Stickie'd breakfast guarantee thread:
FAQ : Marriott's "breakfast offering" explained, by brand and by Bonvoy elite level
List of hotels that don't comply:
Full Service Properties that Don't Comply with the Breakfast Benefit
Welcome gift guarantee thread:
Welcome Gift Guarantee Discussion Thread
Marriotts not honoring benefits :
Another Marriott Hotel Just Not Honoring Elite Benefits
Wifi replacement benefit guarantee:
Replacement Benefit when Wi-Fi is included in resort fee
The terms have a set of table that specify what benefits lead to what compensation (including walks). Most properties it's a genuine oversight of the FDC. Most wouldn't press the matter until there are a series of issues on top of the benefit mistake. When it's clear the property is flouting terms, go for it. Just expect your blood pressure to rise and for management to refuse in such cases. Corporate won't do anything to help you. They may be Marriott's terms, but Marriot's customer is the hotel, not you.