This place is wonderful. It is situated in a small "piazza" or "courtyard" and it is adjacent to the Chiesa di Santa Barbara (church of...). When staying there, you are in an ideal place to explore the Campo dei Fiero, you are within 15 minutes walk to Trestavere, or Via dei Coronari. The area is alive with restaurants, caffès, and stores. The place can easily accommodate 5 sleeping adults, the "rooms" are simple partitions as the building code prevents the owner from modifying this historical building. There is even a "work area" at the back, which I used for a few conference calls and to do some work.
For the mobility challenged, this is mentioned in the owner's description: the toilet is up some stairs. There is also a small step to the apartment - in this area, there mostly always are. Everything was in good working order and I felt very safe coming and going.
Andrea was very helpful in ensuring I found the place and making me feel at home. I will surely return there next time I come to Rome. Great find!