Franco's place is very central being only 3 mins from the termini which is great for transport on the buses and Metro although a lot of sites are walkable. The apartment is very nice inside and was equipped with the basics so had everything we needed for breakfast but maybe a bit limited for cooking a full meal (which suited us as we loved the great restaurants a short walk from the apartment.)
Unfortunately when we arrived one aircon was being repaired and the other was not working but as soon as I asked, Franco's wife brought two fans over which cooled us down enough until the aircons were fixed. Franco was very responsive to all messages, and his partner, Waldy was very helpful giving us loads of information about where to eat, the bus system and local shops when we checked in. One thing I would say is as owners often do in Italy, the living room has been turned into a bedroom (to make it into a 2 bedroom apartment) so there is no living area to hang out in between sightseeing trips.
Overall I would recommend Franco's place to anyone visiting Rome.