This apartment is very worn out, equipment is quite old, spots on walls, ... . Its location is very convinient. If you plan to arrive every evening late in the evening then you would like the proximity of 2 metro stations. The convenient store and brasserie juest next to the building are another advantage. If you are a jogger then you may love to have Bologne forest less than 100 meter away. On the other side linens, towels, beds, ... everything is quite old. The ventilation in the bathroom is insufficient (or non existent). The moist smell extends to the entire apartment. The host welcomed us on the first day despite the fact we arrived very late. he was polite. His English very basic. Based on previous lines... the host would deserve 3 stars.
However, ... the toilet clogged during our stay and the host's willingness to deal with the issue was minimal. Initially, he sent me to a supermarket to buy a drain cleaner , ... after the problem persisted he worried only about the next group of guests who was about to move in after our departure. After I insisted that we were not willing to stay in an apartment with nonnfunctional toilet (with bits of faeces floating in the toilet bowl and spreading smell around the apartment). He advises us to move out, than complained that I was ruining his Sunday afternoon with his family ... only after I threatened him to complain to AirBnB, he arrived to deal with this smelly issue. He tried his best ... unfortunately the blocked tube persisted and the following morning we had floating bits in the toilet bowl again.
Therefore, 2 stars are a maximum. Only the location saved the host the second star.