Alessandro's place is located superbly close to both the Piazza Navona and a variety of nice restaurants. It's located on the ground floor and has a lot of thoughtful touches, ranging from tiny Nutella and jam cups to multiple little trash cans to make sure you can always keep the place clean.
The air conditioning isn't allowed to be touched and is set up in a very weird way, making it quite often get warm in the apartment during summer, but that's really the only downside to the apartment.
I highly recommend the apartment for a short term stay in Rome.