All of the previous reviews are accurate, this apartment is perfect. It is spotless, spacious, and has many amenities to use while you stay (laundry machine, coffee maker, etc.). The apartment is right off the main drag in Trastevere, but it is not a noisy apartment at all. We slept very well here.
The location is perfect, everything is walking distance. If it's not walking distance, the bus is right outside your door to take you to the city center.
Francesca was fabulous, we were late getting in and the person she had arranged to let us in was still waiting for us. At one point the internet went out and she had it fixed immediately. I highly recommend this apartment, it is the perfect spot for a trip to Rome, and Francesca was the perfect host!