It was my first booking through Airbnb and my first time in Vienna as well. The host was very friendly, answered all questions that I had via e-mail very quickly and fully and even gave directions on the places to see in the city. Apartment itself is good for a budget trip: easy access to subway (about 7-10 mins walk or 2 stops via tram). The only thing I was missing is the access to "outer world" - wi-fi, or at least a TV.