We had a great moment at Erman's place. The flat is very cool and the decoration is very stylish and modern.
It is well located as groceries/restaurants/coffees are nearby. The tram passes just in front of the flat, which facilitates the access to the center of Berlin (15-20 min).
Erman is very nice and always available to answer any question. He was also flexible with the check In/out time!
Would definitely recommend Erman's house !