Nicola's apartment was settled in a beautiful and quiet area outside the historical center of Rome. Very bright apartment and located on the 3rd floor without elevator for anyone who might carry heavy baggage.
Nearby there was a metro about 5-6' walk that take you to all the major of the city. Also two very convenient bus lines will take you to all the piazzas and the sights you have to see. If you don't mind to spend the few minutes extra in compare with the metro travel to the center I recommend. It is a really nice trip through underrated sights and beautiful locations.
Definitely recommend the Nicola's house. He responded immediately in everything we needed.
Grazie mille Nicola.