I stayed 3 nights at Carla's house. It was a great visit. When I arrived, Carla offered coffee and gave me some advice about what to see in Bologna. It was very helpful! She and her husband were really welcoming. We had interesting conversations and I felt comfortable the whole time.
The room is really cozy and individual. Everything was very clean. Although her home is not in the center, I could get there easily by bus in 10-15 min. From her house you can walk to "basilica san luca" which is definitely worth seeing. For breakfast she had some self-made marmalade which was really delicious.
Alltogether my visit could not have been any better! I definitely recommend it and would like to come back again.