Ekaterina's (Kat) apartment is spectacular and she is an excellent host. The most important sites are a 5 - 10 minute walk from the apartment and the metro is just around the corner. In addition, Kat has studied to be a tour guide so she has an exhaustive knowledge of the city, its museums, transportation, etc. The apartment is spacious, clean, beautifully decorated with modern art throughout, and is located on a quiet street with a restaurant across the street. My stay at Kat's made my three-day stopover in Vienna a true pleasure!