I stayed with my family for 6 days in Paul&Christa's place. We had a wonderful time. The apartment is much more spacious than the pictures. It has 2 wonderful terraces overlooking Vienna perfect to chill out after a day of sightseeing. The kitchen is full-equiped. Overall, the whole apartment is comfortable, clean and a great place to stay. It is also well communicated by public transportation - there are trams and a subway stop within 5 minutes of the apartment, very useful if you want to visit the sights. The neighborhood is quiet and charming, with a lots of restaurants and cafes. Also, we got to know Paul as "check-in"when we arrived. He is a great host, ready to answer all of our questions and very easy to get in touch with.
We would strongly reccommend Paul&Christa's place to anyone who wants to visit Vienna!