We enjoyed our time in this apartment and I'd recommend the house to other people.
House had everything we needed during our stay.
Close to the public transports and to the city center.
Host has been very nice with us and answered to our questions quickly.
If I really need to find something "missing" then it would be: No smart TV (and Wi-Fi not working very well for a couple of days, then it went back to normal).
Also the building itself it's pretty old and no elevator, but as I said before the house got all the comforts we needed.
Despite some other review the building isn't in a unsafe road.
If I need to come back to Wien I would probably pick this house again.