We had a fantastic stay at Cristina and Alexander's flat. We were welcomed by Marcel who was very friendly and helpful and also told us about some of the history of the area. The flat itself was in a fantastic location next to the Hackescher Markt S-Bahn and situated above the square which is full of restaurants and bars. The flat itself was clean and tidy and exactly as in the pictures. The balcony is fantastic. I would recommend this to anyone looking to stay in Berlin with easy access to the rest of the city as well as shopping and eating on your doorstep.