Marie was indeed a super host. I stayed at her place when I initially moved to Berlin and she generously helped me with my paperwork for my move. She made sure I arrived and settled in smoothly. She was extremely responsive and reasonable with all of my questions. She wrote out clear instructions for how to use things in the apartment and where to go for food, nightlife, and groceries.
She was always kind, which I really appreciated being new to the city. Her place is spacious, clean and comfortable. I highly recommend staying at her flat on your trip to Berlin!