Maria Cristina's place is an AMAZING value. My parents and I stayed for nearly a week in Rome, and I came down with the flu, unfortunately, but fortunate for me, I was staying in a wonderful place!
Maria Cristina and her husband welcomed us, were so kind to us, and wanted us to just have the best holiday possible. Their apartment is close to the metro / buses that take you to all the major attractions, and walking is not too far (20-30 minutes) from their apartment to Trevi Fountain, Spanish Steps, and the Colosseum.
Their apartment was clean, well-stocked, and stylish!