Federica's apartment is amazing, and she is an incredibly warm and hospitable host. She laid out breakfast for me every morning, and most nights I was in the apartment she cooked dinner for the both of us. The room is spacious and has a balcony, and the apartment is located in a really lovely part of the neighborhood. There are a few buses that go from her apartment to the city center, although you may have to wait a while for them to come by (otherwise, it's about a 30 minute walk into Trastevere/the city center). Federica was very sweet and accommodating, and made me feel extremely welcome in her home. I definitely recommend staying here!