We liked the place, it is small but cosy and in the historic house (in 1960s there was a tunnel under the Wall - to help people from East Berlin to get to the West.
Stephan is really nice and and very easy to deal with as a host. He works on improvement of the place and soon there will be a washing machine in the cellar (we also discussed billiard parlour and swimming pool but probably a bit later)
Highly recommend.