I stayed at Sabina's place for 2 weeks and loved it. This was the fourth time I stayed in Vienna for my work and Sabina's place was my favorite so far.
Although being on the Gurtel, which is super busy, the flat is really quiet as it is at the back of the building and away from the traffic. This is what I really loved.
The place is on 3th floor without elevator, which is no issue for me as I can always use some more stairs for a leg-workout :-)
Everything was really clean, with perfect communication.
If I return for work to Vienna, I aim to stay there again.
Highly recommended!