Riccardo is a very nice person and welcoming. He offered us all details regarding the place and neighbourhood.
His appartment is very close to a lot of buses and train station which can take you to the most important places in Roma: Piazza Venezia, Colosseum etc
San Pietro is about 5 minutes walking distance from his appartment, Museo Vaticani is about 15 minutes away. Subway station Ottaviano is also around 15 minutes walking distance from his place.
Excellent location, excellent conditions, Riccardo is indeed a Superhost!
We shall definitely want to come back to his place, whenever we shall visit again Rome.