The flat is very nice! It's clean and there is enough space for at least 3 persons.
The roof terrace is superb. It's great to eat your breakfast and/or dinner with the Vatican walls nearby.
Marianna has been very kind and always responded to my questions by email or text message.
The nearby Metro Station is ideal! Walking to the Vatican will not take you long but always having to walk past the Vatican to see anything in the city can be seen as a downside.