The apartment is big, stylish and very comfortable. Location is very good — it is 5-6 minutes walk from a train/subway station, from where you can get to the city center in about 3 minutes, or you can just take a 10-15 minute walk. The apartment itself had all we needed and even more. It is very quiet, which was good because it was very hot during our stay and sleeping with open windows was absolutely not a problem. Estrella and Gerald were always in touch and quickly answered all our questions. The check-in was also very easy, with detailed instructions provided from hosts. Overall — great place to stay in Vienna, would definitely recommend!