The Grand Mercure Ambassador Hotel is a nice property with exceptional rooms, a great breakfast buffet, a good location in Seoul, and even a casino on-site for guests. We enjoyed the restaurants and the property thoroughly with the only exception of a very bad smell in one of the rooms that got worse during our stay. We informed the front desk of the issue, and they apologized, but we were checking out, so there was nothing that could be done. Strangely the hotel hallways and elevator corridors were extremely cold, with a drafty wind whipping through those areas. But ultimately, it was a very nice stay, and we would definitely return should we be in Seoul again soon.