We were very happy with our stay at Rosa's Airbnb. The description of her rental was exactly as described. The rooms were spotlessly clean, sharing the bathrooms was not an inconvenience as there are only 4 rooms. The breakfast was simple but adequate. The position to the Vatican museum is excellent but a longish walk to St Peters Basilica. The Metro, however, is very convenient and close, and user-friendly. I would recommend Rosa's B and B as it is good value.
Charles and Annie.