We stayed just one night at Renato’s apartment. It is more like a B&B than a private apartment. It has 3 rooms for the guests. At the time there were six people there (but we met them just once in the morning so for us it was not an issue). The room was simple but well equipped. The air conditioning was a blessing in the very hot night. We liked the kitchen, where we could make some coffee and eat our lunch.
The location is a bit outside of the city center so taking a bus to visit the city is advised. Also if you are going from the train station with a lot of luggage it is better not to walk. There was a nice supermarket few minutes walk from there and few bars and restaurants.
Renato was very nice and helpful. He responded very quickly to our messages. He was waiting for us although we were a bit earlier as planned. We had a very nice stay in Bergamo! We strongly recommend this place!