Bernd and Karin were very nice to us during our stay in their place. They gave us some tip to travel around Berlin and recommended some nice restaurants in town.
We spent there 4 nights in total and everything was great. They offer a lovely bathroom equiped with essential things for your stay. We had coffee and tea in the morning which is available in the kitchen.
The apartment is not located in the centre of Berlin, however it only took us 30m to get to the centre. Closed to the bus station, U-Bahn, S-Bahn, Aldi (supermarket). The neighborhood is safe and quiet.
Really recommended!