We loved this apartment - probably our favourite of all the places we stayed in Italy. Amazing views, really comfortable bed, lots of character, well-located. Carlotta is a super helpful host, meeting us in person and showing us everything about the place and some tips about Bologna.
As others have said, there are a lot of stairs to get to the apartment (and the last level is very steep!) but well worth it if mobility isn't a factor for you.
Would recommend to anyone going to Bologna.