Great time in Zurich in December! The appartment is ideally located (just next to the best view over the city and in the old center), close to accomodations, food (COOP) and shops. Christian welcomed me (even brought up my luggage : thank you!) and showed me everything there is to know. The appartment is great for 1 person (and I'm sure even a couple), with a great view of the clock tower. WIFI works really well. Perfect for my business stay.
Problem with the door - wasn't able to lock it. But very safe district and bottom door is locked.
I recommend this appartment!