Mario is a quick, efficient and very professional host who did an excellent job communicating before, and during our stay. Not once did I feel like his instructions lacked clarity or detail, and i was able to enjoy a pleasant, stress-free stay thanks to him.
The place's location is absolutely perfect, especially for travelers. It's well-connected, and at a walking distance from one of Vienna's main train station with a direct connection to the airport. While the building itself is old and not in the best of states, the apartment itself was properly secured and comfortable.
As Mario mentioned to me, the walls are a little thin, making it possible to hear neighbors and outside noise at times, but the neighborhood itself was really quiet.
All in all though, this apartment is absolutely worth the money and we had a great time.