Book it. We were very happy. The host lives next door and gave us great tips. We followed his touring plan. He even got us in a little early.
This place is excellent. The beds are really big. Five people really can stay. Perfect for 4. Great location with a frequent bus right to the Vatican and the metro. Bar Musti just up the street is a weekday place but had a great negroni for 5 Euro and beer prices closer to a grocery. A little farther up is a wine store with great champagne prices to drink or buy. Balduina is a great place to stay. We were there for the university campus, but we missed Balduina when in the city center. Staying up here is a great way to experience Rome away from tourists.