Christian's place is wonderful. It's well located within an easy walk of all the sights of the city, and a tram line stops right in front too to help you get around.
Check in was very easy and Christiana was able to have us come in early, which really helped our planning. She's a great host and easy to communicate with.
The place is very spacious with lots of room. Everything feels new and we enjoyed the espresso machine as well in the mornings.
There are lots of restaurants in very short walking distance and the friendly bakery across the street is worth a visit.
This was a great place to stay and we can heartily recommend it as a great base for any visit to Vienna.