My GF and I really enjoyed staying at Caterina’s place for our time in Bologna and exploring Emilia-Romana.
Walkable to all of the sites, steps from winding streets with great/cool restaurants and bars, and quiet at night - it’s a great location. The apartment was simply decorated, comfortable, had all the amenities required, and large by European standards.
A big plus is that Caterina’s place has parking just inside the center city that was accessible without the ZTL pass (a little maneuvering to get there but not an issue at all) but would recommend staying there even if you don’t have a car.
Unfortunately, we didn’t get to meet her in person but she was super responsive on WhatsApp throughout our stay. I loved Bologna - the sites, food, energy - and Caterina’s place was a great place to explore them all from.