The flat itself has all what it needs to allow a very comfortable rest to two couples travelling together, or a family with 2 or 3 children. Well isolated, well furbished, fit with an excellent wifi /internet connection, we recommend it.
The location is excellent when travelling by train or flight, as it is located near the Termini train station, reachable also easily from the airports.
Regarding parking, as we were touring across Italy, we had our car to park. One can book by internet at the Parking Roma Termini ("parkingaroma.it"), for various days, and have the car to stay safer than in the streets. Those parkings, located in Via Giolitti are really close, with less than 500 metres walk to the building where the flat is. I recommend to stop in front of the building, unload, and then go to the parking.
From there, it is extremely easy to reach any places to visit Rome, or to reach places where to go out. In addition, our guest is gently available to advise and help. Coliseo is about 10 minutes walk. Piazza di Spagna and Fontana di Trevi are 25 minutes walk away; Piazza navona is 45 minutes walk away; Musei Vaticani are at one hour walk (in Rome, as we lived there in the past, and there are so many nice things to see, we always do all walking). And Termini being about 5 minutes walk away, all those places are also reachable through public transportation or taxi.
It could be more central, but it would not be so quiet, and it would not be as convenient because this one is really close from the train station. We judged it was the right choice, comparable to our former address in Rome, and it revealed to be an excellent choice. You can trust it is a good place to be !