It was a short stay at Sabine's apt but she well communicated well with me and arranged things for me.
The location is centre of the Berlin (Mitte) and the park in front of the house is nice as many children play there in the daytime. The room is cozy and clean and the bath room is spacious enough. Also, Sabine kindly let me use the washer as the beer bottle was broken in my suitcase... It was really helpful. If you stay in Berlin for biz or personal travel yourself and want to be based in convenient area, this is really recommended one!!