Neither my wife or I could sleep at all due to an excessively noisy air conditioning unit. I finally called the front desk when a very loud metallic noise (as if something fell and struck another metal surface inside the wall) and the only response was that they would notify maintenance the next day.
Due to being exhausted and not wanting to pack all of our belongings, I did not insist on another room. However, under the circumstances, I shouldn't have had to ask. The response gave me the impression that the staff was well aware of the issue and that our comfort was not a concern.
With as much business as I have given Marriott over the years, I definitely expected better service and attention to detail, especially with something as blatant as an air conditioning unit that is positioned less than 5 feet from the guest bed.
I've stayed at a number of lodging properties in that area of varying accomodation levels. This was, by far, the WORST experience I've encountered. I certainly expected more from a Marriott branded property.