Federico's listing was stylish and spacious. It is up two flights of spiral stairs but an old lift elevator was available for use. The entrance to the flat is off a main road but there is street parking around the neighborhood. It was a 5 to 7 minute walk to the nearest metro station but there was a bus stop just outside.
We stayed at Federico's listing over the holidays and Federico graciously made a reservation on Christmas Eve for us even though it was very tough to find a restaurant.
We travelled with 6 adults + 1 child and had a lot of room. Even though we did not meet Federico (since he operated the locks remotely), it was a great experience.