The place of Cristina is at a great location. Not directly in the center but with great transportation. It is close to metro C line too which makes it faster to travel to different points in Rome. Tram number 5 and 14 easilily gets you to Termini station to join other metro lines, but it is faster and less crowded with metro C. Tram 19 takes you to the Vatican directly, but on weekends it is better to take the metro, even if you need to change from C to A. The apartment is close to shops, that offer food at local price, unlinke in the center. So maybe it is a bit out, the great transport and the lower prices will keep you happy. Cristina welcomed us very warmly. We got help for directions, shops around and she provided soap, sampoo, 2 towels per person, tasty Italian biscuits and real coffee for the whole week. The bed was a bit narrow for 2 of us as we are used to wider ones, but we could use the extra bed of the living room. The house is safe, has a doorman. All we wanted for the 3 of us, we had that. Highly recommended.