My parents came to visit and stayed at Sonia's cute little apartment for 2 weeks. Its centrally located and very convenient, just a short walk from the Pantheon, Campo de' Fiori and Piazza Novona. Sonia was a great host, meeting us at the apartment to talk through all the necessary details. She also has a binder there to highlight quick tips such as garbage pick up, restaurant suggestions, maps, etc.
During their two week stay they had a small problem with the hot water heater under the kitchen sink and Sonia dealt with it quickly.
The only minor complaint they had was you could hear the neighbors on the weekends coming and going on the stairs, but that is normal for apartments here in Rome.