I would recommend this room to anyone. The rooms is very big, really comfortable, with an access to a private toilet, kitchenette and shower (sometimes you have to share it with other airbnber).
Kerstin and Lars are really nice person, and their place is very well located, 3-4 min walks from the metro station, and in 15 min you reach the central station.
I stayed 5 weeks at their place, and would have stayed longer without any doubts!