All I'm going to say on this matter is that I'm glad to see one poster is saying it is still good (I am stay there in December). Also I'm surprised at those of you who are taking your business away because of what you have read on this thread. It is one incident, which definately could be handled better. But have you been affected in a similar way?
As for Marriott Concierge not getting involved, they may not be allowed to. As has been suggested in the thread, the central office do not seem to want to get involved.