Everything was perfect. Roberto is a very helpful and flexible host. The place is clean and comfortable. We loved Italian style breakfast and delicious coffee. All things are exactly as in description and on the pictures.
Perfect location for visiting Bergamo, as you can easily get from the airport (direct bus connection) and to the Citta Alta (couple of minutes walking or walking + funicular). In five minutes you can get nice coffee shops, restaurants, markets and shopping street.
I definitely recommend Roberto and his al Duca B&B, it would be my first choice if I ever go to Bergamo again.