The apartment is perfect, so is the host Francesca.
She meets and greets you as an old friend and her place has a very nice touch to it.
Located close to the great area of Testaccio, 20 min walk from Trastevere (the tourist zone of the area at least), 3 min walk to busses and tram, a large grocery store, cafe's and restaurants literally downstairs.
Bus tickets available at the news agent downstairs.
This has been my preferred area when visiting Rome for the past 5 years ; there's a lot of great food around and hardly any tourists.
Nice and quiet apartment with a great terrace (Sun during the morning, shade during the afternoon heat, which is perfect).
I would highly recommend the place!