Stephan's place is situated in a nice neighborhood with lots of interesting places to eat and drink.
Stephan was really welcoming with lots of tips and availability.
Somebody in the comments said the place was not warm enough. There is a mobile heater. We used upstairs, at some point we had to turn it off and open the window as the air was too warm so don't worry about the temperature. You can find your comfort.
The place looks great, clean, perfect for a stay in Berlin. Lots of books related to music and nice taste in arranging the place.
Finally the piano is amazing to play! Perfect to get lost in it for hours! <3