When Marriott news email announced the new Marriott Cruise program the reward points and Marriott quality reputation led to booking a eastern Caribbean Celebrity cruise. We and 3 couples booked with veranda cabins. Our only request was to be placed on the same ship level, close to each other.
As the February cruise approached we reviewed arrangements for cabins. Low and behold two couples on deck 6 and two housed on deck 7. This travel agency reported that they had no control over assignment of cabins, nothing could be done.
I filed a complaint with Marriott about the quality of their business partner. Their answer is they have no responsibility.
I recommend that you always use a local travel agency to book cruising. Never use Marriott Cruises....