I had a wonderful stay in Nathalie's apartment. She was a very gracious and thoughtful host. I'm allergic to cats, and she recently adopted one, but she was very careful to vacuum the house frequently and keep the (very cute!!!) cat out of my room. She is also a valuable resource for what to do and where to go in Vienna - she was full of cafe recommendations! The apartment itself was also very nice and clean. The private bedroom was spacious and quiet (despite being next to the kitchen and bathroom). I thought the apartment location was great; it was only a short walk to the 1st district but far enough away that you could get some space from all the tourists. There are a LOT of stairs to get up to the apartment, but I got used to it after a couple days. Overall a great apartment and great host!