We really enjoyed our stay at Horst's place. It was in a residential area and was quiet and secluded. It was about a 10 minute walk to the S-Bahn station, which was really convenient. It's a bit of a ride into Berlin city center, but we felt being closer to the airport was nice rather than being close to city center, especially for early flights. We took a taxi to the airport when we left for about 13 euros, but the S9 line also appears to run 24/7 and that is an cheaper option for getting to the airport as well. (Side note: S45 doesn't run late, but S9 will and you can get to it from S46 line if you happen to come back really late). There was a supermarket next to the S-Bahn station. The place itself was really nice, it was a cute guest house next to their main house. It had everything we needed, and also the washing machine is in the main house so there needs to be coordination to use it. The shower was small. The wifi was good and reliable. The hosts speak very limited English, but it wasn't a problem. Our only interaction with them was at checkin and over messages, but they are very quick and responsive. Horst and his wife were very kind.