The place is away from the touristy areas. So the restaurants in the area are frequented by locals and as a result have authentic food and reasonable prices. The touristy areas are very easy to get to since this place is a 4 min walk to public transportation.
There is also a local opera that is walking distance and not crazy crowded like the one downtown. We enjoyed a top notch performance at a very reasonable price and were able to book just a few hours before the performance.
As mentioned in other posts, Christian is a gracious and welcoming host. He spent a considerable amount of his time describing the things we could do in his hometown. He stocked our fridge with milk and orange juice and also gave us a cake. So we did not have to scramble for breakfast the next day.
I would highly recommend Christian and if I come to Vienna again, will definitely stay with him.