A Casa a Testaccio was a great place to spend a night before venturing to Umbria. It is located near the regional trains (both Roma Ostiense and Roma San Paolo are nearby) and the subway (Piramide station). The neighborhood seems safe with a multitude of dining.
On arrival, Gianlorenzo greeted me, showed me around his place and then left me to myself, however made sure I had his mobile number if needed.
The place was clean and appeared just as advertised, with a bathroom shared with one other room.
If mobility limited, there are about 4-5 very easy steps, but a lift is available to take you to the apartment.
Good stay! Would definitely recommend.