Comfortable & stylish room and ensuite bathroom in a large apartment. The style of the furniture of the building is worth a look too. Everything we needed was provided even free breakfast at a nearby bar which we did not expect. We mostly interacted with Flavio's grandmother who was very nice and helpful and speaks a perfect English.
The building is in a green part of the Trastevere district, slightly outside of the beaten tourist paths but very worth visiting and easily accessible by Tram or buses from the busier areas. If you come by bus (75 likely), step down at the 3rd "dandolo" stop, not the first one or you will have to climb a steep hill. Note also that there are steps to shortcut the street climb.
Would definitely stay again if we pass by Rome.