Federica's place was fantastic. She and her husband had great hospitality and responded within 5 minutes of every message that was sent. Very clean and she had snacks, tea, and coffee out for us to use through the trip. The location can't be beat. If you are a light sleeper, however, you may want to find somewhere more outside the city. The ideal location and proximity to many shops and restaurants makes for a lot of street noise. Also, the walls in the apartment are paper thin. The neighbors were chatty very late into the night and early in the morning, so sleeping was tough almost every night for me.
If you decide to stay there (which I recommend if you are a heavy sleeper), the breaker tripped at one point because we had too many appliances on at once (water heater, heaters, lights, teapot). Federica was very quick to respond on how to fix it, which meant going downstairs and flipping the breaker at the meter. We were back on in a jiffy.
Thanks so much to Federica and her husband for great hospitality and a great trip to Rome!