We stayed in the Northern Light Villa for 4 nights. The whole family of 7 plus an extra friend. The house is very spacious even with such a large group in my opinion. Everything was spotlessly clean and prepared when we arrived. The location is tranquil, a little outside of the city but with a great S-Bahn connection to the city centre of Berlin in just about 20 minutes or so. The nearest station is just 15 minutes' walking distance from the house.
Gritt was very responsive in communication and answered all the questions and inquiries we had. True super host in the positive meaning of the word :-). The only thing that could be improved is the stability of the internet but that is often hard to influence and did not bother us much as we were out exploring the city the whole day anyway :-).
Overall we did enjoy our stay very much and do recommend the accommodation as well as Gritt as a very hospitable host.