This is a beautiful large apartment with an excellant location. We were a family of 11. The rooms were big with high wooden ceilings and plenty of beds. The A/C worked well. It is located on the second and third floor without an elevator so if you have mobility issues, this would probably not work. But it was fine for us.
Rafaella arranged reliable transportation for us from the airport to the cruise port, from the port to the apartment, and from the apartment to the airport. She was quick with her email responses to my questions. We were allowed to check in early (around 11) which gave us the entire afternoon free.
It is only a 5 minute walk to the Pantheon, 10 to the Fountain of Trevi, 30 to the Vatican, 30 also to the Colosseum. The small piazza below has a fruit stand in the morning and three small restaurants. There are also lots of little shops all around and two grocery stores within a few minutes walk. Even though it was so close to everything, it was hidden away, not full of tourists. It felt like an authentic local experience. The family loved it all. I highly recommend it.