Wunderbar !! What a great place to discover Berlin since our favorite area : Kreuzberg, Neukölin. The flat is really near the subway station and you are near everything by bike.
There is a lot of wonderful little shops around, to rent a bike, drink a coffee or buy some really good vinyls. The appartement is really comfortable and warmy. There is a collection of wonderful books. I highly recommend Sabin's home to come in Berlin.