The Vatican City Apartments hosted by Nicolo J are exactly what are advertised. The space is quite large by European standards with US queen size beds in both bedrooms. It was furnished nicely and was spotlessly clean when we arrived. Nicolo was a superb host. He adjusted his schedule to be present when we arrived, assisted us with our luggage, provided a pocket map as well as a book of maps in which each map was marked with the location of the apartment and directions to various conveniences.
The location was excellent - barely a mile walk to the Vatican. There is a subway station nearby, though we chose not to use it as we had been warned about excessive pickpocket activity. Nicolo mentioned this but felt we would be safe if we were very careful, but we still chose to walk (needed the exercise anyhow!).
The apartment is not in a tourist area, which is actually kind of nice. We had a nice meal at a local Chinese restaurant and found the prices to be way lower than in the tourist areas. The restaurant staff didn't speak English at all which is a challenge outside the touristy areas, but we managed with our bits of bad Italian.
My previous (and first) Air BnB experience was not so great - this experience redeemed it completely. This would be the perfect place for a family needing affordable, clean space for tourist activities.