We had a great stay at Ursula's apartment.
The apartment was very clean and very beautiful in the center of Vienna. Most of the sightseeing was very close,so you can go there by foot. The view of the apartment was magnificent because just across the street was the National Library.
I saw in some critics that the apartment had some noises from the street. We didn't face that problem.
Overall,we had a great stay and we will choose Ursula's apartment again if we visit Vienna in the future.