The location of Sabrina's apartment is convenient. It is a:
(1) 3-minute walk to the Ottaviano station. This station which is on Metro Line A is itself a 15-minute train ride from Roma Termini (which might be the station you go to from the FCO/ADR airport). Termini is itself a 32-minute train ride from FCO (should you take the Leonardo Express).
(2) 10-minute walk to Todis (a fairly cheap grocery store) and to the Vatican City.
(3) 15-minute walk to St Peter's Basilica.
(4) 20-minute walk to The Tiber.
(5) 30-minute train ride to the Colosseum.
The apartment was missing toothpaste, bathing soap, and a dryer (for laundry). Also, the pillows in the bedroom could be better. That said, the apartment had most essentials like cups, plates, blankets, microwave oven amongst others. Surprised to have seen some Olive oil!
The apartment has no balcony and almost no natural lighting. Not an issue as we were barely at home in the day, and even when we were, Sabrina's multiple installed lights compensated for the lack of natural lighting. You're never quite in the dark: The lights do indeed drive away darkness!
The stairs to the bedroom are made of metal rather than wood. That's practical as it means there is about zero squeaking when you go up and down, especially if you've folks asleep whilst you move around.
Sabrina was on hand to welcome us. She was kind enough to recommend good places to eat. She was clear and prompt in her communication. Overall, Sabrina's place is nice. And she's a good host!