Massimo's apartment is beautifully renovated, clean and is located in a central part of the Bologna. The photos on the Airbnb site are accurate. I make only two points you should be aware of:
1. The kitchenette is small and has only one small light. It is not ideal if you intend to look a lot at home.
2. As others have pointed out, the ceiling beams are very low in parts of the apartment, especially in the bedroom. I bumped my head some six times during our 4-day stay.
Other than that though, I would warmly recommended Massimo's apartment.