We stayed for two nights at Roberta's flat (end October). The green room was really clean and comfortable. We enjoyed its location, which is on the border of the historical center and not too far away from the Central Station (if you don't mind walking). Just be aware, if you have a light sleep, that you might be awakened by the other travelers' noice and the scooters in the street. We did not meet anyone in the flat (besides for the cleaning) but Roberta was really reactive to our messages and had some suggestions ready in the common area. The possibility to let our luggage in the common area was also quite handy. So enjoy !