We had a great 4 night stay at Stefano's guest house that exceeded our expectations.
Stefano met with us personally on the first night and gave us a tour of the space. The included breakfast was at a cafe around the corner a minute's walk away from the guesthouse - we thoroughly enjoyed the coffee and daily selection of pastries. Also there was the option of daily housekeeping which meant that we always came home to a clean and fresh room.
The location suited our needs within walking distance to the Vatican and the main tourist attractions on the other side of the river. The guesthouse is also right outside an exit for Lepanto metro station.
We would definitely stay again.