My stay at Katharina’s was perfect. I had everything I needed during my stay. I was able to get a good chat with Katharina and her roommate, Patrick. Both seem like nice and friendly people. The bed was comfortable, I was able to do two loads of laundry and pretty much had the place to myself most of the day. I highly recommend this place for a quick stay in Berlin. The S-bhan is very close and you can get any where in a short time frame.