We had a nice stay in Berlin. Some very good points: the flat is centrally located and perfect to visit the whole city, it's nice, clean and well decorated. One point we regret: there was a small note book on the kitchen table with all the house rules (and the list is quite long) but not a single recommendation for a good restaurant in the area.
Some suggestions: add a light over the mirror in the bathroom and more crockery/cutlery in the kitchen