I was there only one night after missing the last train to my next destination, but Rosina and her husband are very welcoming guests! They accommodated me at the last minute and still everything was ready when I arrived. I didn't have time to enjoy much of Berlin but it is very centrally located (a 20min walk to the Reichstag, and a few meters away from a very nice park). The room is very clean, comfortable and warm. I highly recommend!