This was an excellent place to stay. Fabrizio and Roberta are great hosts.
You may think it is too far away from downtown but the 52 bus stops outside the building and takes you down to the Trevi fountain and Piazza Navona area. Bus 52 is a cute, little and clean bus that is not packed. You also get to meet some nice locals if you are lucky and see parts of Rome you may not normally see.
There is also a good grocery store nearby that is open until midnight (Carfour Market). It is quiet and the staff and other grocery shoppers are very nice.
It is a very safe neighborhood, the concierge of the building is a gem, he makes you smile whenever you see him, and the apartment itself is clean and set up well if you want to make some of your own meals and have long relaxing meals on the terrace (or inside).
We had a great stay and highly recommend it