I had a great time in the appartement.
It was clean, well equipped and had nice interior.
I lacked a towel to dry dishes and a bottle opener (luckily my wine bottle had a screw cap). But those were easily accessible through communication with the host.
Another thing that i noticed was the lack of curtains/privacy measures at the toilet, i guess the windows were fairly high and no one can look directly at you and i didn't have a problem with it, but others might feel exposed, especially at night when the light is on and you can't block the windows.
Very flexible check-in and check-out times, very nice!
Easy instructions how to get to the appartement and enter it.
Great acces to public transport (hintere zollamtstrasse and wien mitte mall).
I had a pleasant stay and communication with the host was impeccable.