Karsten provided us with very useful instructions on how to reach the apartment from the airport (super easy by public transport) and was there to welcome us to Berlin and the apartment on the day.

The ground floor apartment itself is super nice and clean, close to the U-Bahn and has a bakery, pub and restaurants in the nearby. There are two supermarkets one stop away (or a 10 min walk). The neighbourhood is nice and very safe.

We enjoyed our stay in Berlin very much and most of that is due to the convenience of staying at Karsten's place, which has everything we needed. Would highly recommend.