The flat is beautiful, just as in the photos - one very big room plus kitchen and bathroom, very wide bed; lovely and light, simple and pretty, with a gorgeous wooden floor, in a big 19th century building. Everything was very clean and there's everything you need. Kiki was really friendly and helpful, always responding quickly to my messages, and was flexible when I had to rearrange dates. Unfortunately I got sick during my stay; again, Kiki (who lives in the flat next door) was very helpful, offering to take me to a doctor if necessary. As stated in other reviews, things that might bother some people are that there are 84 stairs (fourth floor), but they're not that bad and it's lovely having the view of the rooftops; also, the trams in the street outside are loud-ish and fairly constant, but you soon get used to them. The area is pleasant; there's a nice café next door for breakfast etc., and the centre of town is just a 10-15 minute walk away. Key collection/entry codes were explained in detail and were very easy. The flat was just what I was looking for to get a sense of "old Vienna". Definitely recommended.