Rouven's ground-floor apartment is well-located right by a great neighborhood. We stayed over the New Year's, and it felt nice and festive. The apartment is well-equiped! We found everything we needed (kitchen items, functioning shower, large enough bed, storage for clothes, etc.), unlike many other Airbnbs we stayed in Europe.
The apartment was excellent except for that every fabric item smelled bad, like they didn't get dried properly after getting damp. The bedding and the living room carpet were especially bad. So much so that we couldn't sleep well the first night (it was fine after putting them though the wash on the 2nd day), and avoided going to the living room. Extra bed sheets and towels in the storage smelled the same, so it seemed like the issue was with how they were washed (I don't know about the living room couch and the carpet).
I want to note that the apartment was clean otherwise, though! The problem was just with fabric items.