Staying at Bibi's house has been a unique experience and I recommend it to anyone:
Location: you can't be more central in Bologna, Bibi's apartment is just a few meters away from the Due Torri and 5min walk from Piazza Maggiore.
Apartment: the apartment is beautiful and very classy and you have access to the kitchen and the living room. The elevator is a plus, as the apartment is on the second floor.
Room: I stayed in the smallest room (there are bigger ones) but it's really great for one person. The window gets to an interior court, which keeps the street noise away, it's very quiet. The bathroom has a bathtub, always a plus after a long day's walk. The room is clean and very well equipped (big wardrobes, coffee machine, kettle, extra pillow ...). Wifi of course.
Last but not least, Bibi: she's welcoming and friendly, works hard to make your stay the most enjoyable.
I hardly recommend any of her rooms, you'll not regret it!