I stayed at Jürgens apartment for a month while doing an internship in Berlin. My stay was very pleasant. Check in and check out was real easy. The apartment was clean, new, very spacious, and just overall an excellent deal for the price. Jürgen was always quick to respond within a few hours of writing to him. The location is great with a supermarket right across the street, plenty of restaurants in the area and both a tram stop and S-Bahn stop just around the corner.