Jens's place is in a wonderful location just minutes from Museum Island, very well connected via FriedrichstraBe station and in a safe, friendly yet fun neighbourhood. You access the apartment by going through a beautiful, green courtyard which is a peaceful haven from the busy centre of Berlin.
And once you're inside, you would have no idea you're in the heart of the city, it's so peaceful and quiet. It's also very spacious with a big kitchen-dining-living area, again an amazing thing given that it's right in the middle of things. Communication was good and we had no trouble checking in or out of the apartment.