Really convenient location of the apartment. You can quickly get to the main attractions by tram or metro. The apartment is quiet and has been nicely renovated, has everything you need, and there is Netflix and Alexa. In real life, the apartment looks much better than in the photo. Moderate price. Christian is a pleasant and polite owner, and answers questions quickly.
About cons - not very comfortable pillows, if there are four of you cutlery may not be enough. Be prepared to clean the dust from under the bed by yourself if you need to. The shower drain gets clogged pretty quickly.
These disadvantages were acceptable to us, so we did not worry about them.
I think we could come back to this apartment again when we go to Vienna next time.