Sevi's flat is a great little find in Zurich.
The flat is a charming mix of lived-in but also immaculately clean - including fresh sheets, towels etc. The facilities are shared with the room host and a second Airbnb-er - so three rooms in the flat in total plus hall, kitchen, and bathroom; but three works fine.
Sevi's place would likely work best for tourists travelling around Europe, especially those who see a virtue in saving money staying in interesting, dynamic areas, and not the usual hotel boulevards. Longer-stay students studying in Zurich would also do well staying here.
Sevi is a great room host, with a good eye for detail of likely needs of his guests, and a good judgement on making his guests feel welcome without being either too aloof or too over-engaging.
The flat is only a ten minute walk to the train station and in a hip, up and coming area. Langstrasse still has a bit of the red light vibe to it - but the area is active enough not to be seedy, with people sat outside bars and cafes sipping bers and wine wrapped in shawls (twas wintertime), people coming and going with their lives, and the observing police vans doing the rounds from time to time.
Overall, a great stay, great room host, and bargain find in an expensive city!