It was spotlessly clean and probably one of the few places with normal modern bathroom.
The place is located far from everything (except Schonbrunn palace). It is 20 minutes walking to the palace and to and from the subway (not convenient with luggage).
We were visiting during the winter and it was freezing cold inside. We messaged the host about it and nothing was done. The thermostat was put on max (there is floor heating that doesn't do anything) and in the morning the temperature barely reached 18'C.
There are a lot of rooms and if the place is full - you will hear everyone.
During the spring/ summer/ autumn the place will be more pleasant with the outside terrace and the inner closed yard. I definitely do not recommend staying there during the winter!