The apartment is lovely, and just as it looks in the profile, and the area is beautiful too. We enjoyed the walk up in to town (it's fine with a buggy too!) We felt that the building was very secure and private. The host was waiting for us when we arrived and had made up both the beds as we mentioned we weren't sure if we would share a room with our baby. They had made the cot up beautifully too.
Communication was great beforehand but slow once we were in Bergamo, but perhaps because our question wasn't urgent.
The apartment was spotlessly clean except that someone had forgotten to empty the kitchen bin and there were no replacement bin bags. Also the washing up sponge was very old and there was only a tiny bit of washing up liquid. Since we were cooking in the apartment a lot, this was inconvenient.
Because we were going to bed early with a small baby, we found it a bit noisy: on the first night the pizzeria/bar downstairs was open late with people out back in the garden, then on the second and third nights there was some sort of festival across the green at Sant Agostino, but this must be rare.
Overall we really enjoyed our stay - the apartment is perfectly placed to explore the old town with its sites and views, and the new town with its conveniences.