We stayed 4 days at Laura's place and it was perfect - it's close to the main sights, it's close to the train and bus station, it's surrounded by all kind of shops and bars. Yet the street is quiet and not many cars and people pass by the building.
The apartment itself has got everything that one needs for a comfortable stay in Bologna. The two bedrooms are separated so that two couples can have their own private space.
Overall experience: feels like home.