We stayed two nights at Alessandro's apartment. There is a private parking in the yard with an easy access, the road is quite so no any noise at night, location is very close to the funicular (abt 5-8 min walking) to go up to the upper town or 10-15 min to the city center.
In the apartment there are two bedrooms (one master and one small) - ideal for families for 1-2 small kids, a living room with kitchen which has all necessary utensils (probably just a microwave would be a plus), all spaces are very clean. Communication with the hosts is quick.
I would definitely recommend this place if you plan to stay in Bergamo.