We had a very pleasant stay in Sebastian's apartment: it's very quiet (windows are on a courtyard), spacious and luminous, clean, with a comfortable bed and enough room for two persons. We had the opportunity to cook and use the provided washing machine, and everything worked as expected. Sebastian provided detailed check-in instructions: be sure to check them as the street number indicated on Airbnb is actually for the house on the other side of the street. He was also very responsive and helpful.
The only thing that would add comfort is the missing show curtain, in my humble opinion.
A final remark: everything is exactly as on the photos. We were just surprised by a large painting on the living room that we weren't expecting and that made us a little uneasy, but nothing dramatic.