My colleague and I stay at this appartment for 5 nights during Cosmoprof. The price was obviously higher than usual during that period. However it was amazing. Starting from the communication with the hosts, the flat itself, the check-in process (someone was there waiting for us), the view, the quietness, there's an elevator, the bed and the sofa bed were both super comfortable, full functional kitchen (there's even a dishwasher), spacious bathroom (with washing machine).
I always stay on Via Felice when visiting Bologna as it is, in my opinion, the best location (only 8-10' to Piazza Maggiore), and there's the best restaurant in town (Trattatoria Da Me).
Definitely recommend this place and will stay again in the future ! Lea & Luci