We had a great trip to Rome and this apartment is in a great area of the city. You can literally walk to all of the major sites within 20 minutes in either direction. There is also a metro station about 15 minutes away that can take you to the farther attractions, but we rarely used it. Marco gave us a list of restaurants and places we had to see and that was very helpful.
We took a car service from the airport and we're glad that we did, because the apartment is a bit hard to find if you are not familiar with how the streets and addresses work.
The apartment had all of the amenities you could need and we were very happy with our decision to stay!