Sonia's place is as beautiful and spacious as on the photos. It's in a nice location close to a street with a lot of restaurants and shops. The apartment itself is extremely quiet, I slept very well. Check-in and communication were very easy, and Sonia also recommended a nice little restaurant which we liked a lot. The flat is fully equipped with kitchen, washing machine etc.. I would definitely recommend this place, especially if you want to discover Vienna but also recover at "home" from walking around.