I have stayed for one night and simply had the smoothest airbnb experience ever.
The check-in is intuitive and immediate, I had no problems with my late check-in (around 10pm).
Once I entered the apartment I really felt a top quality atmosphere: everything was in its place and fully functional, the furniture had that designer touch I have never found anywhere else.
Plus the whole building is amazing and really convenient for its position, right in the middle of Bologna historical center but still in a quiet street.