I had the pleasure of staying several weeks at Francesco's. His place is very clean and quiet, and there is a nice exotic feel about it, with the house and walls full of small keepsakes from his travels. Outside, the garden was like a little oasis in the suburbs and it was great sitting on the terrace when the weather was fine.
Francesco himself is the very gentleman, and helpful about local transport and sightseeing (there is a nearby ancient aqueduct).
The supermarket is right next door, and very useful for supplies, especially as I could cook at Francesco's. However the local Chinese restaurant, literally one minute away, was fast, cheap and fine when I wanted something different.
Transport to or from Termini Station in the city on the 105 bus can take between 25 and 40 minutes, depending on the time of day. However it was very frequent, plus there is the option of taking the under-utilised (in off-peak times) urban railway that goes from in front of the St Ne (ie Stazione) Centocelle bus stop.
Highly recommended!