We were extremely happy with the apartment. It was very spacious, clean, and everything somebody could need. The communication with Ben and Simon was excellent and they responded quickly to questions. The office is located in the building in front of the apartment and we were able to get in person help there as well. Everybody was extremely friendly and forthcoming.
The apartment is located not far from many tourist attractions, like the zoo and Brandenburger Tor. And with a S-Bahn station 5 minutes walking distance from the apartment, we were able to get everywhere with the public transportation system without having to navigate the traffic or finding parking spots.
We had a good stay at Ben and Simon's apartment and would recommend it to others.