We absolutely loved Martha's place! Views from the windows and three terraces (!) were breathtaking (old beautiful villas and gardens of the neighborhood, and then - thanks to the apartment being located on a hill - other parts of southern Rome; we could even see Colli Albani in the distance!). The apartment was close to numerous treasures Rome has to offer while being in an enclave of peace and quiet (we slept really well).
Martha herself was very friendly and helpful, and the recommendations she gave us were great!