Stephan's and Betty's studio was clean, pratical and tastefully decorated. Everything is carefully thought out. The location is excellent: quiet, pleasant street near a major U bahn station, lots of restaurants nearby. I would definitely recommend it for a short stay. The fact that you sleep on a convertible sofa and the lack of a washing machine make it less suitable for a longer stay.
Stephan was quick to respond to my messages and flexible about the arrival time.