We spent the month of December 2016 at Rosa's place -apt just south of Trastevere. The size of apt was more than adequate for two people. Transportation by tram or bus is only a 5 min walk away. The apt is located in a quiet, safe neighbourhood with access to grocery stores, bakeries, and restaurants. The building had an elevator.
Rosa checked on us on a regular basis to see how we were doing and whether we needed anything. She gave us valuable tips on sights to see, restaurants, and where to buy bus passes. Rosa has an excellent working knowledge of English. We had a wonderful time in Rome and recommend this stay!