Really great stay in Vienna. Julia is a great host she answered all our questions very quick. Also it was said that her apartment is available for check-in after 16:00 but we were arriving early so she asked her friend to meet us and we checked-in at 11:30 already. About the apartment - the house seems to be old and the entrance hall looks a bit shabby. But the apartment itself is really nice and clean and has everything you need. It is 10 minutes from metro station and there are a couple of restaurants and cafes near. And really nice bar right in the next building. But be prepared that cafe and bar workers don't speak English, so please learn some german words.
Just will say once again that Julia's apartment is a great place to stay in Vienna with a good price.