If you're looking for a hotel with a great location, friendly staff and spotless rooms, look no further than San Francisco Marriott Marquis Union Square. Guests rave about the cleanliness of the hotel with most describing their rooms as super clean, modern and comfortable. The hotel attracts a diverse clientele and is known for its secure and well-maintained property. Some guests noted minor issues with cleanliness, such as dirty hallway carpets or smudged glasses, but overall they were very pleased with the level of cleanliness. The hotel's cleaning service received high marks from guests, although a few felt that it could have been more thorough. Overall, if you're looking for a clean, comfortable and well-maintained base while exploring San Francisco, the San Francisco Marriott Marquis Union Square is an excellent choice.