Hey,
I stayed for 6 weeks at Christa's place. The place is okay at best, its pretty old and especially my room has weird furniture-structure. One cannot use the couch properly because the desk stands right in front of it. All furniture is pretty old and looks a little bit scrubby.
Location wise, its not optimal. Its already in Oerlikon, which is pretty far away from the city center, but then its also pretty far from the oerlikon train station, so you cannot just jump on a train and go to Zurich main station in 5 min but you have to take a very slow tram to get to Zurich main station.
But the worst thing is the host: I lost the keys to the airbnb, which is honestly my fault. I was willing to pay the cost for replacing the keys, what I always communicated openly. I talked with the Co-Host and she confirmed to me, that the total cost will not be more that 50-60 CHF. I was very fine with that. I just discovered the she requested 880€ for exchanging all the locks. A total overkill, because I lost the keys in a different part of the city without any hint to the address or to my name. She did not explain the sum or why she decided to exchange the locks, she just send me the bill.
There was also another thing: when I lost the keys, I needed a way to enter my room. so I asked if they had an additional key. they said no so we ordered a key-service to open the door. I had to pay for the key-service (which is totally okay). after we ordered the key service, the Co-Host discovered a bunch of keys including a key for my room.
I still had to pay for the key-service, which was a waste of money, because now we had a key now and the Co-Host did not even say sorry or was willing to cover a part of the bill.