The place is awesome.
Very well connected to the airport and to the rest of the city (the buses and train station a stone throw away from the apartment take you everywhere in minutes).
The apartment itself is incredibly functional and super cozy. Everything you need is going to be there and should you have any particular need Gunther and Alan are always available to help. Great host, great communication, lots of useful tips and suggestions to navigate Berlin...
Truly a top spot. As soon as Berlin next calls I will know where to book my stay!