Andrea is a great host - he is easy-going and willing to give you the best guidance possible to make sure you spend your time well in Bergamo. He has the inside-knowledge, which means: knows the best places to visit, best Italian restaurants and can even help you plan your trip well. He even gave me an advice what meal to order :) And the best thing is that you do not even need to ask for all of this - Andrea is super easy-going and has tons on video materials for tourists. If you are as introverted as me you will love this.
The guest house is located in a perfect area to do a walk-by sightseeing. It is a historical place and looks exactly as on images. Andrea lives next door and he is always ready to help. Rules are simple and price is fair.
The only thing that might turn you off is the accomodation aesthetics. If you are not into historical places, you should consider different location. However, if you can appreciate that aspect of the location, you should definitely book it.