Heval is a great hos , hospitality schools should hire him because of his skills. We arrived around midnight and he was there , he was patient to explain everything in apartment and to give us useful tips. Highest level of hospitality.
Apartment is on good place , close to U-bahn that is connecting you with all interesting places in city. Furthermore, on less than 5min there is supermarket and good Italian restaurant(tuscany), in park across the street(old airport) you can rent a bike and price is as on all the rent a bike places. Apartment is a bit out of the city center but again it is close to everything and gives you feeling how the real Berliners are working, what we found more important than to be in centar of touristic happening.
Finally, apartment is made for AIRBNB , super convenient , many beds, clean, with a lot of windows and light, 2 bathrooms, fully equipped kitchen, and nice common area with huge dinning table and approx 12-15 seating places.
Our experience with this apartment was extraordinary and we suggest it to everyone.

Cheers