My wife and I wanted to check out Vienna right after new years. Naturally, all the hotels in the area were booked or priced exorbitantly, so I created an AirBnB account and saw Helena's place. We lucked out with her, she is super communicative, her (very awesomely decorated and appointed) apartment is located in the best part of town to sight-see (just two blocks away from the U-bahn orange line), and she provided a comprehensive catalog of local tips and places to go.
Bottom line: 5/5 experience, couldn't ask for more.