We stayed in Guido's apartment for 10 nights and had a positive experience.
The apartment is accurately described and Guido is very helpful. Bergamo is a real gem and the property is ideally situated between the old town and the newer city which allows for good walking access to Bergamo's main sights in the beautiful old town and the newer area's bus and train stations, shops etc. We did not have a car but were able to travel throughout the region most days by train or bus. Bergamo is a great base for visiting picturesque towns on Lake Iseo and Como. Milan is an easy train ride away. Verona is a bit further away but easy by train.