Elena is a great host, very kind, responsive and helpful. Her apartment is in the residential area of Vienna, the neighborhood is very quiet, safe still the transportation is really good - two metro lines are in walking distance. Huge supermarket, restaurants, bars, cafes are also really close. The apartment is fully equipped - good for longer stay, as well. There are TVs and stereos located in all rooms, also a microwave-oven in the kitchen (it was not visible in the pictures). You can find many cabinets, shelves, drawers to store your stuff.
I would highly recommend Elena's apartment for anybody who visits Vienna and would like to stay shorter or longer period there.
Thank you Elena for your kind hospitality and help!