We were happy with our stay at San Giovanni Rooms. We never met our host but he was very easy to communicate with and has a very organized system for guests. Access to the room was the easiest of any of our Airbnb stays with very clear instructions and the key was available via lockbox for entry whenever guests arrived.
The location was convenient, quiet and felt very safe. We were approx a 15 minute walk to the Coliseum, and other major sites and about 20 minutes to the main train station. Metro and bus stops were very close by.
The rooms were simple, but clean and comfortable. It had its own shower in the room which was handy after long sweaty days walking around. Our room was a bit small for 2 people but ok otherwise.
FYI Other rooms in the shared apartment were larger and had their own full bathrooms.
I would definitely recommend this Airbnb for your stay in Rome.
Betsy