Stefan and his wife Emilie are very kind, nice, polite and helpful host. Before i arrived the city, Stefan shared a lot of detailed information about city life, how to commute to apartment with alternatives etc. He was easily communicative and very helpful. His wife Emilie showed me the apartment. She is literally the most professional host I've ever seen. She gave me very detailed and helpful brifing about stuff inside the apartment, markets, local restaurants, cafes, city life and so on. They prepared a booklet which included all necessary information, tios, advices about city and daily life that you may need. The apartment is very clean and tidy, it has everything you need and nicely decorated interior. It is just couple meters away from the famous opera building. It's exactly at the heart of the city, you can reach any attractions of the city by walking. Stefan and Emilie's place should be your first option in Vienna.