A really nice place! The apartment is big and spacous, clean and quite. The area contains some restaurants, food shops and a "spätkauf" (kiosk open late, for whine, beer etc). Only a few minutes walk to the subway with easy axcess to Zoologisher Garten and further communication. Helmut is easy to get in contact with, and 'help' is not far away.
The beds are a little bit to hard for my liking (and three of the other fellow guests), but not a big problem.