The position of the apartment is really good (3 mins from Klusplatz tram station and 5 min from Bellevue by walk). It is very quiet even if it's located in a central zone of Zurich. The host is reactive, no matter what you ask. They helped me a lot obtaining a permit, they allowed me to put my name on the mailbox and for any problem I had they immediately sent someone to check/fix. The bi-weekly cleaning service is amazing and the room was always really clean.
Probably the price is a bit high for the apartment itself, but it's in the average of the area.