We really enjoyed our stay at Perla's. The apartment is a thirty minute bus ride from Termini. By her house there is a bus stop that will take you to St Peter's in 15 minutes- it's a beautiful ride, right down Gianicoli, past Piazza Garibaldi (with its spectacular panoramic views of the city!). The tram is convenient too and you can get from Trastevere to the top of her road in ten minutes. The apartment itself is very comfortable and she provided milk and wine and bread for ours stay. All in all, a very pleasant stay- thanks Perla : )