Simonetta and Massimo made us feel very welcome. Massimo kindly picked us up from the Fiumicino Airport on a Friday evening. They had left breakfast for us so we didn't have to worry about that. The apartment was perfect for the three of us, the kitchen was well equipped, and there was good wifi.
The apartment is around 10-15 minutes walk to St Peter's Square (the Vatican), and we were able to walk to Piazza Navona, the Pantheon, the Trevi Fountain. Massimo showed us where the bus stop was to get to the Colosseum/Forum.
We went into the Prati area for dinner and drinks, which is around a 20 minute walk. We also enjoyed the local Irish bar, they're very friendly!
Thank you very much Simonetta and Massimo!