Great location for spending a couple of days in Bergamo. Short walk to the funicular or old gate to make your way into the upper city. 10 to 15 min walk to the busier part of the lower city where most of the restaurants are. The flat is set up really well with spacious sleeping and living areas. It was perfect for the two of us and we enjoyed our time there very much. Very secure with gate protection from the street.
Note that there are no grocery stores or markets close to the flat, so if you want to have food on hand you need to make a longer trip.