Giovanna is an incredibly kind and hospital host of her home. The location can hardly be beat. Just a few minutes walk to the Vatican City. It's a further walk across the river to some of the other sites, but I still consider this to be a prime location. If you're not walking you're not doing it right. The streets felt very safe for me to walk back late at night from the city centre. Everything was very clean and the room is really large with a private door to the back patio for fresh air. You've got coffee in the room and a mini fridge which is helpful. I'm not sure about parking. The place is on the ground level apartment on a quiet street with a grocery store, cafes and restaurants very close.
I would recommend Giovanna's warm home and I'll be sure to come back myself since it felt so comfortable to be there.