We had a great stay in Caterinas Apartment. We didn't meet her in person, however she was always quick to answer and gave us great recommendations. If you don't have a problem with a shared flat (we had the bathroom for our own, so it was kind of like a own flat, just the kitchen was a shared space) Caterinas apartment is perfect to explore Bologna. It's right in the center and everything is easy to reach. We can definitely recommend it!