We enjoyed staying in Simona's apartment very much. She's a perfect host. Responds quickly to questions and is very friendly and helpful. The apartment is lovely. They have done a beautiful job of restoring the apartment in this 15th century building - with its very own original fresco! The apartment is as described and is beautifully clean and comfortable.
It is a great base for seeing Bergamo and the surrounding areas. The No.1 bus goes past the end of the street (about 5 mins walk) - it goes up to the old city (which is a must) and all the way to the station and on to the airport. It's really convenient. It is also close to the funicular (about 10 mins walk) which goes up to the old city. Our tip is to get multi-day pass for the local transport (we got a 3-day pass for 12 euro). You can use it on al the local buses, funicular and the airport bus. The local station connects you to Milan, Brescia, Lecco etc.
We had a lovely time in Bergamo. There's plenty to do, see and eat.