First, Salvatore was terrific. We arrived in Rome early in the day and he arranged for us to access the room as soon as we arrived at the apt - in fact, he was waiting for us.
Second, a few blocks from Piazza Navona (not by accident as that is where we were looking), we were in walking distance of all of the major attractions. Some walks were 45 min - but the best way to explore a city like Rome is on foot. There is something to see at every turn!
Third, the space was attractive and nice. I was there with my younger (29 year old) son. The space was perfect for us. The space would work with a family of four - but not more than that. Two couples could be a bit tight - especially for the loft bedroom. Main floor bedroom was roomier.
Finally, the one thing to be aware of is that the two bedrooms are without walls. There is visual privacy in the main floor, less so for the loft. Between my sons coughing (had a mild chest cold) and my snoring, and the jet lag - we kept each other awake half the night.
I highly recommend this place and would stay here again when I'm back in Rome.