I stayed here twice (both before and after travels for work), so I'm posting basically the same review twice. One thing I forgot to mention in the other review is that you have to walk up several flights of stairs to get to the unit, so it wouldn't be appropriate for someone with mobility issues. I'd recommend it to anyone else though.
It was a pleasure staying at Katharina’s place. My expectations were high given all the positive reviews, but they were certainly met. The location is great and the apartment is exactly as described. She was very responsive to questions and I appreciated the snacks she provided. I was a little worried about how check-in would work since I didn't have cell phone service when I arrived, but her instructions were very clear and she was prepared to be flexible about my arrival time, so it was actually quite easy. I didn't interact a ton with her since we were both mostly busy leading our own lives, but she was kind and helpful in answering any questions I had.