We had a very pleasant stay in Bologna. We booked only a few hours before arrival and it was no problem for Riccardo. He was there when we arrived and showed us where to park our car and informed us very well about Bologna and it's must-sees. He told us about the (updated) rules regarding to Covid-19.
The appartment is very nice and it's about 15-minute walk to the city center.
We'd definately stay at Riccardo's again, if we visit Bologna in the future.