Checked into the Marriott Mariner hotel in San Diego for a conference on 3/5 and stayed for 3 nights. Excellent experience. Staff is very friendly and helpful. The room is clean and the lobby is very nice as well. Housekeeping did a great job. We stayed in the South Tower and it was closest to the convention center and the gym. The only inconvinence is that the gym is not in the hotel itself. You have to walk through the convention center rooftop to get there. The pool is awesome though. It was heated to 80 every day, which is wonderful in March. There is a Star Buck right in the hotel. You are right in the beautiful seaport when you walk out of the back of the hotel. We would definitely stay there again. It's worth the $300/night.
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