The apartment was in a very central location, next to the subway ( just one minute on foot). Also it is next to the KitKat club, oke of the most famous clubs in Berlin.
It was clear enough, you feel very comfortable.
It was sunny enough and for two persons as big as it's needed.
The only disadvantage was the bed, it's not so comfortable.
Jeff was very communicative and kind with us, and very helpful!