Guido is a very good host, friendly and responsive, he was waiting for us at the apartment and provided plenty of info about the apartment and the city, including a map where he marked the best spots as places of interest, restaurants and bars.
The apartment itself is huge, located around 20 minutes walking from the train station and just a few steps from Bergamo Alta, the old part of the city which is truly beatiful and the bus stop. The area was safe, quite and the rooms are nicely decorated.