Esther is very friendly and responded as soon as we had questions. We did not need a map, as she told us very precisely how to get to her place.
Note that the flat is on a 4th floor with no elevator (so a welcome workout after trying Berlin culinary treasures)! The room is stylish, quite spacious, comfortable and as described, & so is the flat. I strongly recommend having breakfast on the small balcony over the square! Neukölln is a really cool area, vibrant, very cosmopolitan and multicultural. Follow the canal and you'll reach the center and its nightlife, walk down the streets and you'll discover Tempelhof airfield.
Bottom line: we loved Berlin, and Esther's accommodation took a great part in it.