Even though we only stayed one night, we had a lovely time at Luana's b'n'b.
She and her daughter(?) gave us warm welcoming. They provided us with a map and gave us helpful recommendations for restaurants, sights to visit,...
The apartment itself was very nice and extremely clean. Luana offered typical Italian breakfast. There is also a well-equipped kitchen which one is free to use.
The location is very convenient - all the famous sights are in walking distance and there are nice places to eat and drink all around. However it is located on a rather large street and therefore it could get quite noisy (it didn't bother us too much).
Also even after check-out we could leave our luggage in the apartment until we left Bologna (late in the afternoon).
All in all we would definitely recommend Luana's b'n'b!