We had a lovely time in Karsten's apartment, he made us feel very welcome during our 4 day stay in Berlin. The place is very clean and exactly how it looks in the photos. It's in a very good location with many cafes, bars and restaurants nearby but is still nice and peaceful. It is also only a short walk away (5-10 mins) from the s and u bahn which have many lines making it well linked to all areas of Berlin. Karsten also kindly let us use his bikes which was such a nice way to explore more of the city. I would highly recommend this room to anyone visiting Berlin, and am very thankful to Karsten for hosting us, we wish our stay could have been longer!