GREAT GREAT GREAT 5 Stars, i had a great time it was just perfect. The host is very helpful and also funny, he gave great tips what to do and where the special places are.
He is a real Viennese but friendly :-) The apartment is very nice furnished and very cosy, you have everything you need nearby and you are in the green space near the most visited attraction in Austria the Schönbrunn castle! Which is a must visit.
There is nothing to criticize.