We had a great stay in Marzia's apartment. The apartment is very spacious and tastefully decorated. Upon our request Marzia even arranged additional baking utensils.
The apartment is ideally located on a lively piazza in the hart of Trastevere (the downside being that it can remain lively until late in the evening) and at walking distance of most major historical attractions of Rome.
We would definitely recommend Marzia's apartment and hope to come back one day.