Emilia's apartment is an excellent choice to stay in Rome. It's located at Trastevere, a the most beautiful zone of city, with dozens of restaurants and bars, and several little shops. It is also next to the main touristic points, only 20-45 minutes by foot to the Vatican, Pantheon or Fontana do Trevi. Also, there are some public transport stops that can connect you to the Colosseum or Termini.
Regarding the apartment, it had everything we, a young couple, needed. Emilia was constantly in contact with us. I totally recommend her place.