We used the accommodation during our trip to Vienna State Opera. The experience was simply outstanding. We arrived by car, the parking house (Karlsplatz) is just 7min walking from the apartment, 1-day price 12Eur, which is excellent considering you are in the city center of Vienna. Opera is only 7min walking from the apartment, city center (Stephansplatz) additional 5-10min, U-Bahn entrance practically next to the building, so excellent location of the apartment. The studio was clean, well equipped (kitchen, bathroom, bed, etc.) , check-in and check-out went great by using the codes, so no need to schedule personal delivery of the keys. Place is quite, we slept like babies ;-) We would be definitely considering the same apartment when we come to opera next time ;-)