Marcello's flat is a great little place to stay while visiting Rome. It is the perfect size for two people who want to spend most of their time sightseeing. The flat was clean and comfortable with all the basic amenities.
Location wise the flat is in a wonderful neighborhood very close to piazza navona. Be aware that taxis can't get directly to the flat though so it is best to plan ahead.
We didn't get to meet Marcello, but his assistant Lavinia was an outstanding stand in. She greeted us on time, should us everything we needed to know, and even gave some very useful tips about what to see during our stay. Overall, the flat is quite basic, but for us, who had limited time in the city, it was just what we needed,