Lorenzo's apartment is a more modern one than what you would find in downtown Rome. For our purposes this was great. It has a nice terrace and the location is super quiet.
Lorenzo's friend Roberto was who checked us in and he was super nice. He booked us a driver to take us to the airport the following day and even clued us in on an intetesting false perspective optical illusion concerning St. Peter's dome. You can see the dome from the street down below the apartment. If you face St. Peter's on Via Nicolo Piccolomini and walk towards it the dome shrinks, and when you walk back away from it toward the appartment it seems to get bigger. It's a cool illusion. Roberto also gave us a lift down the hill so we could go get dinner.
And that's the one drawback of this location, you are not close to anything. But for us I chose it for the proximity to the airport and that worked out great. Just realize that you are sort of isolated in this spot.