Staying with Rosa was great! Not only was our room adorable, and comfortable, but it came with a cute balcony! And it was very conveniently located near the Vatican Museum, a metro stop, and several nice restaurants and gelaterias.
And Rosa was just great. She set up a ride from the airport, and let us keep her bags with her for an afternoon after we left so that we wouldn't have to lug them around the Vatican all day.