We very much enjoyed our time at Beatrice's apartment. The location cannot be beat. It is a block away from Campo de Fiori and mere steps away from a fantastic little restaurant called My-Ale (which had amazing Italian craft beers and organic meats and cheeses, as well as some of the best focaccia we've ever eaten).
Beatrice was an excellent hostesss, always quick to respond to any question or request that we had. We really felt like we could rely on her to help us out. We arrived early and she met us with a smile and a great suggestion for a cafe to get our visit off on the right foot.
The bed is amazingly comfortable and the apartment itself is cozy and very nicely decorated. The only thing I would mention is that there is not a lot of natural light. It wasn't really a problem for us, as we tended to head out each morning to discover the city and really only ever got back after dark.
As I mentioned above, the location can't be beat. We were able to walk from the apartment to everywhere we wanted to go, from the Trevi Fountain, to the Pantheon, the Colosseum, the Vatican, the Jewish Ghetto, the Monti district, Trastevere, and beyond... everything is right there for you to discover.