Hope u enjoy Berlin- NK.
We had a good stay at Annabella's place. The communcation with Annabella regarding the booking of the room was quite problematic and took a long time though. The price is alright for 1 person but a little bit expensive for two I would say. All that said and done Annabella was a really friendly hostess and the flat is reasonbly decorated. It is pretty easy getting there with the U-bahn and an interesting part of town to live in (many arabic shops and so on). If you are sensitive to noise you should consider that it is located on street level and that the wall is not sound proof at all. We slept alright anyway though.
Also the appartment was not the most clean and tidy place you could imagine...
We did not bother though and we just enjoyed the artsy interior :).
All in all a decent place.