Let's talk about the host first. Marcello is a very good host and he would be available whenever you need any help. He picked us from the airport and also from the train station when we were stuck there at night. He speaks perfect English and great person to have a conversation with.
The homestay is absolutely clean and has a very homely feeling. It's always nice returning there after a long day. The lightening is a bit dark in the rooms meanwhile the day though - but it didn't really matter because we were only there in evening/night/morning.
The place is just 10 mins walk away from the tram station. Moreover, just around the corner, there is a great pub worth visiting.
Overall we can warmly advice this place if you plan to see Bergamo.