Silvia was wonderful. She met us at the apartment when we arrived in town. It was a short and inexpensive taxi ride from the train station. She even warned us about the unlicensed taxis and not to go with them.
The apartment is small and efficient but nicely laid out with possibly the prettiest bathroom we had on our trip (one wall was glass block). It had a small kitchen and dining area. The bed was actually a pullout sofa but quite comfortable. We never used it as a sofa.
Silvia had a number of suggestions for nice restaurant at all price levels. Guide books sat on the shelf over the bed. The apartment is also very close to a little grocery store.
The greatest thing about this apartment is its location. It was centrally located to all the main sights. The first day we walked to Tivoli Fountain and the Spanish Steps (both under renovation unfortunately). The next we walked to the Forum and Coliseum. The following day we walked to Vatican City. We never took any public transit as everything was such an easy walk for us.
When it was time to leave Silvia even arranged a taxi for us to the airport. She was an excellent host.