Arno's flat is a good and comfortable solution to use if you want to explore the city without being too far from the center, since the suburb is approx 10 minutes away from Banhofstrasse by tram and 5 minutes from the Zurich HB station by local train (S-Bahn).
The apartment is located in a very quiet building, it's clean, spacious and quite equipped.
In the nearby you can find various supermarkets and shops (Denner, Migros, Lidl).
Arno's assistants are nice and helpful, which led us to have no problem checking in and checking out of the structure.
I think the quality / price balance of this flat is very good, given the high prices of the city (Switzerland is an expensive place all around).
I would definitely recommend this place to everyone!