We enjoyed Testaccio enormously. It was full of small shops, a variety of good food, interesting buildings and within walking distance of many points of interest. It is a suburb where Romans live. We stumbled across a craft beer festival and had a fun night there. The apartment was spotlessly clean and well appointed. It was extemely quiet, looking out onto a large central garden. It had double glazing and shutters. My husband has trouble sleeping and this apartment worked well for him. If internal security is important to you, both the bedroom and the bathroom have internal locks. And externally the apartment building, the staircase from the garden and the apartment itself all have locks (I felt like a medieval chatelaine! ). I would try to book again next time I am in Rome.