We had an excellent time staying at Massimos place. The apartment was very, very clean and he had everything prepared for us. He even arranged a taxi to pick us up on the day of our departure.
Just off the beaten path and very walkable to the city center, markets, and historical building. There is a very interesting old bar just a short walk down the street, that seems to be busy with locals at any time of the day. There is also a culinary gem hidden a few blocks away called Osteria Broccaindosso. Highly recommended staying here and touring Bologna!