Constantin was easy to comunicate with, the meetup was very easy, and he gave us great recomendations for the nearby nightlife.
The flat actually is bigger and brighter than what It looks in the pictures, with everything necessary. The vintage gives a warm atmosphere, and It is located in a trendy borrough full of nightlife, whereas being around 20' walk from the centre,. Well communicated by bus and u-bahn.
I would repeat again.