Marco was both helpful and responsive. His apartment is small, but has what I needed. it is in a very quiet location. I loved the large rooftop terrace.
I loved the central location, a short distance from e.g. the Colosseum. If you need to use the metro, the Cavour station is nearby. At least two smaller supermarkets are also nearby, plus lots of restaurants and cafes.
Hopefully Marco's apartment will be available on my next trip to Rome.