We really liked Carsten's place. It's a very lovely flat and he took good care of it. It's spacious and clean. Carsten is very friendly and he responded to messages promptly. We arrived late in the night but he waited for us. It's a few minutes from a S bahn and a bus stop, it's a big S bahn station with several bakery/cafe, you can have breakfast there. There is also a small bakery right downstairs. It's about 20-30 min to all major attractions by subway.