Marein's place was wonderful. It was as expected from the description. We spoke only briefly at check in since we were fairly busy for this vacation, but she was very friendly and easy to make contact with. I would not hesitate to recommend it to others.
This was my second time staying in this general vicinity, and it is a great location. You can easily walk to Alexanderplatz or take the nearby U-Bahn or tram anywhere you would like to go. There are also some very nice restaurants within a short walk.