The various Marriott divisions seem to have the most problems with rates when you book through central reservations. At one Courtyard, they tried to charge me around $30 more per night over what I had confirmed at. I questioned it around 6 am and the manager happened to be around that early. He looked up my reservation on the computer and saw where I had been quoted the lower rate & later it was changed upward; he fixed my bill with the lower room rate, no problem. Recently at a Fairfield Inn, the quoted rate was about $25 higher than what was shown on the Marriott web site. I inquired at check-in and they gave me the lower rate, no problem..