Giulia is fantastic, always ready to help, very accommodative and makes herself available via text message or down the corridor at her office. She even helped us book a taxi from the airport.
The pictures at the airbnb website are very accurate, the apartment is bright, spacious and very central, just a short walk to piazza del popolo and also close to a metro station. It's also very quiet.
The only thing I would suggest, is maybe to have a more thorough cleaning in between guests.