That was a perfect stay in Kathrin's place. It was my family trip to Berlin. Kathrin's place was very convenient to get in touch with the supermarkets (NETTO, ALDI, EDEKA) and Volkspark. Also, it was not far away from Alexanderplatz, the connection with S-Bahn and U-Bahn were very good!
Kathrin's place was clean and tidy. I recommend her place without any hesitation!