We had a lovely stay in Vienna at Peter and Katharina's apartment. The apartment was perfect, just like the photos. It was in a good location especially if you are traveling to the city by train. It has everything you need close by eg transport links, supermarket, shops, restaurants.
Peter checked us in and gave us an excellent overview of the city, things to do and places to eat. We went to one of his suggestions, Plachutta's, and had an excellent meal! Also, they provided 2 really handy travel guides to Vienna and we did the walking tour from one which we enjoyed :)