I visited Vienna with my parents for a week in April, and our stay in Clemens and Gabriele's appartment was the perfect home away from home. My parents are both in their 70s, and it was their first Airbnb experience. They were positively surprised at the standard of the flat, and the cleanliness. The flat was also located close enough to the tram and U-bahn and other amenities. The hosts also provided a nice folder with recommendations for restaurants etc in the surrounds. I can recommend the restaurant called Zwischenbrückewirt. Really could't find any faults with this flat.