Overall, the stay was a good experience. Annie-Sophie was very welcoming and often responded in time. The location of this flat is very convenient and there are also supermarkets and small restaurants around. However, if you are staying in winter like us, you need to be aware that the water heater only runs hot water for about 20 minutes and it takes a long time for the heater to fill up again.
Besides, only half a roll of toilet paper was provided in the flat. And many supermarkets were closed on Christmas Day so it was a bit of a hassle.