We didn't meet Kiki but her instructions were very precise and we had no problems finding the apartment and the key. The locality was excellent with bars, cafes and a good restaurant very near by and a simple 15 minute walk into the centre of Vienna. We went close to Christmas so, as expected, Vienna was beautiful with Christmas lights and street stalls. The museums and Palaces were fascinating.
The apartment was ideal for our needs and was just as described. It was clean and simple with everything that we required. The 3 storeys of steps might be problematic for older visitors or those with very small children but this caused us no difficulty. We would have no hesitation at all in recommending the apartment and we'll definitely go back.