The honest review is:
The host is perfectly friendly but keeps enough of a distance for you to get on with your holiday, a professional.
The whole place was clean enough for me, and warm and comfy for a single person.
The room was private and provided the idealic vista of the central station and the park next to it.
All together, this top floor room in the middle of Geneva should be the only place I would stay, if I was given a choice. Top marks (for me).