We had a great time in Carsten's apartment. It is just as described, and has fantastic views over large parts of Berlin. The place was spotlessly clean, cosy, and in a nice and quiet neighbourhood. The cafe at the corner is just the place to start the day with an espresso, and the area around has a very cool mix of shops and restaurants, just check it out! The terrace just made it all perfect. Carsten himself is very nice, welcoming and accommodating. Highly recommended!