Stefan's flat was as described and pictured. The location was convenient and with very useful local amenities such as groceries and take away food. The beds were comfortable and the flat was quite clean!
It was simple accomodation - no tea towel to dry dishes, one arm of the sofa broken, and some wobbly dining chairs, but nothing that made our stay unpleasant. Even with 4 of us staying we were comfortable and this made a great base to explore Berlin.