I booked on very short notice, but Ina - not being there in person as announced in the description - managed to have one of her roommates bring the keys to me on time and show me the flat.
The flat feels a little rundown and messy, but everything relevant worked as expected, enough power outlets were next to the bed. And the door lock should be less notchy from now on. ;)
Location is brilliantly close to Wien Hauptbahnhof (main station), U1 Südtirolerplatz and bus 13A. A bakery is pretty close.
Worked for me. :)