The following comments are offered as advice to be taken into consideration.
First of all, the host asserts " Heat is cut off at 10 in the night even on chilly night based on the law in Germany."
Second, the lighting sensor at the doorway is so poor that the guest may get hurt on the staircase.
Third, the hot water is not supplied until 5 in the evening. If you get ill like me because of cold baths on chilly days, the host never feel sorry for it but make up lies to shun.
Fourth, there are always spiders in the room, in the narrow bathroom, and on the corridor.