THERE WAS MOLD IN THE BATHROOM!
We found many moldy spots in the bathroom (e.g. shower floor, several walls), which is unacceptable, especially so as Kristina listed the apartment with the 'Committed to Airbnb's enhanced cleaning process.' tag.
If you can set aside this issue (which is hard), then the place is okay. It is small, as advertised, but just enough for two people, it is well equipped and the bed is comfortable too. There is easy access to public transport and many stores.
There were a few minor inconveniences (e.g. the power outlet next to the bed was not working, the place was very noisy), but since we spent most of the time outside of the apartment, this was not a big issue for us.
Getting into the flat was easy, as Kristina gave us detailed information.