The location of this apartment was really ideal - maybe 100 feet from the entrance to Campo de Fiori. It was just far enough that the noise from late-night partying wasn't bothersome and close enough to be there in a minute.
Massimiliano and Silvia answered all of my questions, and arranged for a nice car to meet us at the airport (for 50 Euro cash to the driver). Silvia met the car when we arrived and walked us in and showed us around the apartment. Silvia made sure we had her number in case we had any questions. They had even left us a nice bottle of wine to enjoy. We arranged for the same car service to return us to the airport and they arrived promptly.
Like any place in this part of town, the building is old. The entrance is through a short, somewhat skeevy ally, and you must walk up a flight of stairs to get to the lift (which is big enough for one person and one bag), and then walk up another half-flight to get to the door. Of course, you can walk up the stairs too. Several rooms have been renovated, and there is adequate air conditioning for every room.
The kitchen has a full-sized range and sink, but a bar-sized refrigerator - certainly big enough for beverages and a couple of ice trays and some leftovers. There's also a microwave and an electric kettle. I think there was a coffee maker; but fresh cappuccino was literally a couple of steps out the door.
My wife and I sleep on a soft mattress with a generous featherbed topper, with big fluffy pillows. So, the very firm mattress and very firm pillows made sleep difficult; but this is really a matter of taste. Towels were adequate in both size and quantity.
If you haven't been to Rome, there are districts. Fancy hotels abound along tony Via Veneto in Northern Rome. If you want to be in the heart of ancient Rome, then Campo de Fiori is where you want to be. From there, you can walk to the Pantheon, Colosseum, Forum, Vatican and all the dining and nightlife you could want.
I couldn't be happier with the location and our hosts. We'd stay there again.