My husband and I stayed in Mars' home for a month and we had a very pleasant stay. Mars is very easy to contact and while we never met him, he coordinated our stay very well.
The apartment has all appliances that you would need, it is located very close to a train station, and is a well-maintained spacious single room.
It would have been nice if we could have been provided with more garbage bags. [Garbage disposal is a highly complicated affair in Zurich, and for people who are new to the city it is hard to buy the expensive garbage bags, and then not know what to do with the rest of them!]
Overall, it is a nice place, but slightly on the expensive side.