Nice and bright apartment on the top floor. The terrace is surely great during the warm season. One bedroom is facing the street, so noise is inevitable. The other one is quieter. There is the Mercato delle Erbe right next door, which is great for buying food but there are also very good small restaurants, which you shouldn't miss.
Helen and Denis are great hosts and were very helpful as we had some minor issues during our stay. Bologna is an interesting city and I can warmly recommend this apartment for your stay :)