This apartment is spacious, beautiful and in a very good location. Being on the other side of the river from Central Rome has great advantages: you are in a green and leafy neighborhood, away from most crowds (except for the ones going to the Vatican). You are still very close to hundreds of cafes, wine shops, specialty food shops, and the biggest covered market in all of Rome (Mercato Trionfale -- don't miss it for cheese, meat, fruits, vegetables, even toilet paper and clothing!).
The rooms are spacious and the bed quality is excellent in all three rooms. The lighting in the whole apartment is excellent -- there are so many options in each room. Sheets and towels were of good quality and plentiful. Our family of four were quite comfortable here.
Mary and her colleagues (Giovanni and Paolo) were very responsive to all our needs. Paolo came over one night to help us with the oven (which we had mistakenly locked), and Mary sent a plumber one day when we needed it.
We would definitely stay here again. You should know that key sets are limited (we got two sets) so that if several people want to come and go at different times, you must coordinate carefully. This is the downside of staying in a home instead of a hotel. But a minor inconvenience compared to the great experience here. Mary says no one else has ever had a problem with keys, but we like to be as independent as possible and come and go separately at times.