We spent three nights at Olga's apartment and felt very comfortable there. It's a cosy home with a multicultural outlook. Highlights: little terrace with BBQ, excellent sound system in the living-room, well equipped kitchen and beautiful location within walking distance to the very center of Zurich yet in a quiet and beautiful street. Even though we didn't meet Olga, she made sure everything was perfectly arranged for us, paying great attention to details which made our stay so pleasant! Moreover, she left plenty of travel suggestions (including a map with different routes around the city - we strongly recommend walking through her blue tour, it's the most amazing one and you get to experience some wild nature!) Strongly recommended :)