The room was clean and just as listed and the bed really comfortable! The host seemed nice and was willing to give us tips about Viena and also provided us with a map of the city!
What you should bear in mind is that within the apartment there are quite a few rooms and various shared bathrooms and toilets which makes it more seem like a hostel. Nothing wrong with that tough!
What bothered us though was the area as it was close to the center but felt a bit unsafe. It's close to the Westbahnhof and a center for drug victims and young unemployed people which explains why the neighborhood mainly consisted of drug addicts and homeless people.
If you don't mind the area it's certainly a good place to stay as it is pretty central and inexpensive for Viena!