If I could give six stars out of five for excellent communication I would. The apartment is really lovely and located perfectly to see the beautiful historic part of Vienna with easy access to tubes and trams or if you fancy a walk then most places you'll want to see are within easy walking distance. Zeno is an excellent host, the accommodation was spotless with some nice touches thrown in for us to feel at home immediately.
There's not much more to say. Perfect experience and would recommend in a heartbeat!