We warmly recommend Kathrin's place.
A very comfortable place. There was one room with a double bed, and two other connecting rooms with double beds (one has it's own kitchenette.
The kitchen is very well equipped. There was a lot of thought put into a visitor's needs.
A comfortable dining table, easily seats 6, with extra chairs.
No closets in the rooms but hanging space instead.
Walking distance to Aldi supermarket and Edeka. Tram and busses nearby,
The lovely park is also very close by for picnics, walks and hanging out.
What we found less comfortable was that the lift does not stop at all floors. You have to go up or down a flight of stairs to reach the lift. But that shouldn't be a problem for young people.