We stayed in Mari's apartment for six nights in early January. There are many things to like about the apartment. The location is excellent - within walking distance to all the sights, as well as the train station. Thus, it was a great base to explore Bologna and take daytrips to nearby cities such as Ravenna and Ferrara. There are large and well-stocked supermarkets within a few minutes' walk. The apartment is spacious, including a large bedroom with lots of storage space, a large bathroom, and a comfortable sitting area. We did not use the common outdoor patio area due to the cold weather, but we imagine it would be great in warmer weather. Mari was easy to communicate with - she responded to all our messages quickly.
The windows of the apartment face an internal common space, so there is virtually no street noise. However, the walls easily transmit the sounds of the neighbors, so when the neighbors were talking loudly we heard them quite easily. Lastly, note that the guests do not have control over the apartment's thermostat to set the heating parameters. Mari controls that remotely, so we had to message her whenever we wanted to raise the heating temperature in the apartment.