A great place to stay at!
The location is very good, close to mariahilfer street where you can do the best shopping and board a U-bahn to the center of Vienna.
The apartment is very clean, you get everything you need plus air conditioning, which was a life saver as it was above 30 degrees Celsius when we visited Vienna.
Christian always answered if we had any question, and gave us very good directions how to get to the apartment from the airport in the cheapest way! There are also a list of tips in the room, things like where to visit, tips about public transportation etc.
In conclusion, we had a great time!!! And we recommend this place to everyone who thinks about a nice vacation in Vienna.