A couple of rooms above the ground and a crypt (stone chambre in the basement) in this AirBnb run under the command of the responsible host, Aida. She is very helpful and kindly let me drop off my luggage at around noon even though the official check in time is 2pm. The place is clean, hot water is available in the shared shower, and wifi is fast. The location marked by AirBnb is not correct. It is actually midway between Piazza del Duomo and Porto Napoli (at the other edge of the city). So the distance to the train station is 25% more. But it is still within walking distance if you know the way. If you have luggage, you can consider taking a bus that goes around the city to Porto Napoli, and then the walk is much shorter. (I hope AirBnb staff can adjust the location if they see this review. The current one on the map is precisely Duomo, which is impossible. I only know the correct address the night before when I asked the host.) Though the air in the crypt is not completely fresh, a dehumidifier is placed there. It functions and it goes on and off by itself roughly every 15 minutes. The sound can affect those who are sensitive but it is not a problem to those who are not.