I stayed for a month long thesis project and this was a great place for a longer stay. The kitchen was equiped with basics (though no oven), laundry machine worked fine, and a great place to stay overall. Heating also worked well in my bedroom.
The area felt safe even at night and was about 20 minutes walking most bridges to cross the river or close to many cute cafes in the south.
The shared bathroom worked fine with the other flatmates for the most part and Marie is very particular about the condition of the flat. While the rules and information she sends at first seem like overload, it did lead to a cleaner stay and she was more than willing to step in and communicate on my behalf if any issues arose with the shared flat.
Overall, I had a nice experience with my first long term stay using AirBnB and I would endorse Marie's place.