One of the most unique and definitely among my favorite AirBnBs ever. The location is fantastic, nice and quiet street and building, but tons of restaurants, stores, cafes etc nearby and very well connected to other parts of Berlin by public transport.
The apartment is uniquely decorated, very comfortable and well equipped with everything you need (particularly the kitchen, which is often very sparse in AirBnBs). I spent two weeks there and couldn't have been happier.
Frank is a fantastic host, very friendly, immediately responds to messages, was very accommodating when I needed some special help with the check-in.
Summary: 100% recommend.