Marina's Airbnb "luxury apartment" in Trastevere was excellent for our (four of us) six day stay in Rome. It was outstanding in three respects.
First, the apartment is very comfortable with a newly furnished (modern) kitchen, finely appointed bathrooms, and a comfortable living room in which to collapse after a long day touring Rome. The term "luxury" is not an exaggeration and the cost is quite reasonable. The windows are double-paned that kept out the evening noise of the lively neighborhood.
Second, the apartment's location in the heart of Trastevere is a huge plus . It is an interesting and lively neighborhood with lots of restaurants known for serving for fine traditional Italian dishes (check the New York Times). This is not "touristy" at all, as it attracts mainly "locals". Furthermore, the cost of dining is far less that that of eating in the center of Rome, i.e., a full dinner in Trastevere costs less that a more simple lunch in the center of Rome.
Third, although it is across the Tiber River from Rome, the apartment is a short (about 20 minutes) walk to the heart of the historic city center, e.g., Piazza Navona, the Roman Forum, and Capitoline Hill. We rarely needed to take a taxi to anywhere in the city.
To sum up, we had a terrific stay in this Airbnb, and it greatly enhanced our return to Rome. We are grateful to Marina for working with us over the past six months to reserve the apartment.