I stayed 3 days at Ernesto's place and the whole stay was amazing. The location is very convenient, 8 minute walk from the station, 15 min walk from city center, 15 min to the Fiera, and 5 min from a supermarket. The bus stop and a bike hub are near by so you can move around Bologna very easily. Ernesto was very accessible, and responsive. He is very kind and comprehensive, he even let me stay a few hours after my checkout.
The room is equipped with a microwave, coffee machine and a fridge so if you are lazy to go out for breakfast you can easily prepare something.
I really recommend this place for anyone going to Bologna!