Ross and Sonja appartment was very nice! Spacious, modern, nicely decorated. The location is very good, a short walk from every viennese attraction, with many different restaurants and small shops in the vicinity. We ended walking the whole time so we didn't have to pay any bus fares. The kitchen is more than fully equipped, there is absolutely everything you could need, from oven to coffee machine (coffee included)! :) Everything was very clean. Communication was excelent, Sonja is answering the messages very fast, and provided us with more information than she needed to, for example where is the cheapest and closest place to park our car. They even provided us with baby equipment which was super nice! A place to come again and definitely recommend.