Our family of 4 (2 teenagers) stayed at Cristina's wonderful apartment for the final 4 days of our 2 week driving trip through Italy. The location is perfect as the Colosseum and Forum are about a 10-15 minute walk and the Spanish Steps and Trevi Fountain are barely a longer walk the other direction. The only time we needed the Metro was to visit the Vatican.
The surrounding neighborhood is full of energy with restaurants open late to ensure you have time to dine after a long day of site seeing. We loved the neighborhood, as it felt quite safe, even with the late night energy.
The apartment itself was wonderful. Quite spacious with fully functioning A/C in both bedrooms. The wife and I enjoyed the stylish, cozy entry room as we could relax on the couch to read through our travel books for our stay. The kitchen was nice as it allowed us to make our own breakfast each day to save time and money before our day trips. Be warned, however, that the cool cabinet dish rack is designed for people taller than 5 foot 3 inches ;-)
Cristina's hospitality was over the top during our stay in Rome. She provided great suggestions for parking, avoiding the ZTL zones and she helped us secure a driver to FCO as we turned in our Rental Car in downtown Rome.