Marga's villa is awesome. We had a great stay in her house -- very spacious, well decorated and with lots of lights. The swimming pool and sauna facility is a strong plus for relaxation. Unfortunately I didn't have chance to use it during this stay.
Marga and her husband are very friendly. They welcomed us upon our arrival and they stuffed the refrigerator with wines and sparkling water. They are also so kind as to recommend several Asian restaurants nearby.
In a word we did enjoy our stay in her house and we felt as a home in Berlin. We'll definitely stay here again next time come to Berlin.