Elena's apartment by the Pantheon was the best part of visiting Rome! We had a beautiful view of the Pantheon and we would peek out and wait until the line was short. It also meant we could go out and walk around the piazza, return to the apartment to freshen up for dinner, eat and then come back and chill for a bit before walking around the historic center of the city.
It's walking distance from several sites including the Pantheon (obviously), Trevi Fountain, Piazza Navona and even the Colosseum is about a 25 min walk from there. We enjoyed having breakfast at her cafe, which is also walking distance from the apartment. One of the best things for someone like me who frequently gets lost was that I would just put "Pantheon" into Google maps and it would just take me back to her Airbnb. It's easy to catch a taxi from there and there are tons of restaurants and shopping around there. I would highly recommend you stay there if you want to be in the center of it all!
Elena treated us like family and it was wonderful meeting her father every morning at the cafe. I love the shoes Elena! They really helped during the trip. We absolutely cannot wait to visit again and we will definitely be staying here.