We really enjoyed our stay at Sabrina's apartment and Sabrina is a very gracious and warm host. The rooftop terrace is huge with a well-cared-for garden; the double bed is comfortable; the shower has consistently hot water and good water pressure (much better than our other stays in Italy). The apartment is well located to visit the Testaccio food market and within a short walk to the high speed regional train station (took only ~20 min to get to Vatican City). It's a great place to stay if you want to be outside of the main touristic area to get more of a local vibe, but it's still close enough to reach all the main sites easily by public transport.