Well located and clean!
We stayed for two nights and would have happily stayed longer. Alessandros friend Max met us to give us the keys. He was very friendly and gave us advice of places to go look at.
Within 1km of the apartment you have a supermarket and a decent amount of restaurants. San Pietro Metro station is literally 2 minutes walk away. The Vatican and most of the other sights are within walking distance.The neighbourhood is nice and quiet as well as the building.
I would recommend you pack lightly as the apartment is small and there isn't much space for big suitcases. However the space is enough for 2 people.