The room is simple, but because of this to me very nice and full of books! In an old building which is really fascinating and with the view directly on Mauerpark, which is a plus.
Haider and Sabastian always responded very quickly to any message, and asked me if I was comfortable or needed anything extra. Very, very kind. Moreover, there's a metro stop exactly in front of the building, and two other stops (served by other metro lines), which make the place easy to reach, and also easy for visiting other spots of the city.