I spent a month at Christian's apartment and really liked it there. Kreuzberg surely was one of the best areas for me where to set up my Berlin's base camp. Oranienstrasse is just around the corner from this place with all colorful and cozy bars and cafes, not talking about the crowd who really stands out here. Apartment itself is spacious. I lived there with friends and we all got our privacy and at the same time had a great "hanging-out" area in its large kitchen. Bathroom was my favorite, kitchen was well equipped. Even though I had not chance to meet either Christian or Hele, I was in contact with both of them and they were really good companions in our e-conversations:). Friendly and operative. Surely recommend to stay in this apartment if you are interested in being surrounded by bohemian (and cooler) part of Berlin!