Gregor's flat is the most clean and well-equiped place I have ever rented via Airbnb. He thought of everything : beers in the fridge, oil, soap, enough toilet paper, little Maps with indication where to eat and which places to avoid etc....The beds were very comfortable and the flat is very quiet because not directly located on the street. It is located in Kreuzberg (one of the coolest neighbourhood in Berlin) and directly across an U-bahn station. We loved to stay at Gregor's with my friends and if I plan a new trip with my kids to Berlin I will probably stay there as well.