Tiziana and her husband were very welcoming and flexible with my schedule (I arrived in the evening of Christmas eve, not an easy time for anyone in Italy). The apartment was very clean, spacious, easily accessible at the first floor. The bathroom included a handy washer and detergents, the kitchen was well equipped, and the breakfast items plenty and varied. Some cooking basics (such as salt, vinegar, oil) were also included. The wifi worked well for the most part (my devices would occasionally get disconnected, or would take longer than usual to connect, a very minor glitch that did not impact my work). The bed was comfortable, and the apartment heated at a proper temperature. The waste segregation and disposal was easy to manage, and, with the exception of one night, I was always able to find parking within the building gated parking. I was already familiar with the surrounding area, since I grew up just a km away from there, so no suprises there (quiet, conveniently located, and surrounded by the beautiful hills contiguos to Citta' Alta). Three bus lines stop closeby.
The only disadvantage is the poor acoustic insulation of all walls, unfortunately typical for apartment buildings that were built around that time (presumably 1970s, or earlier). Not a big deal, but at times the adjacent neighbors would generate enough noise to potentially disrupt my sleep. However, with the exception of one late evening, I always managed to go to bed and fall asleep undisturbed.
I certainly recommend Tiziana's place and will try to reserve it again on my future trip to Bergamo.