I stayed for almost a month, in the context of a short-term research visit at the J. F. K Institute for North American Studies, FU Berlin (a 5-10 minute walk from the house).
About my overall experience, above all, Katrin and Fritjof are truly wonderful people. Both the house and the neighborhood are simply beautiful; and, at the same time, very well connected to the city center (bus stop and a subway station nearby). Around the neighborhood, you can find a supermarket, coffee shops, restaurants, bookshops, museums and, most important, the magnificent Botanical Garden!
On the other hand, the room and related areas (kitchen and bathroom) are, in one word, superb! Moreover, If you are looking for privacy within a family atmosphere and surrounded by a beautiful neighborhood, stop looking! You have found the perfect place to stay in Berlin...
In summary, Katrin and Fritjof always did their best effort to make my stay even more comfortable; and, by all means, they succeeded, I felt almost at home. What can I say, from my perspective, the perfect airbnb experience!