Claus' and Stavroula's apartment is just outside the tourist area but within walking distance to the center of Vienna and to one of it's main train stations. so it is ideally located for exploring the city. As I often had to leave early in the morning it was a nice bonus that you could take for breakfast as you liked both from a well filled fridge and a rack full of other tasty stuff. Besides the hosts are easy going and in for a nice conversation on all kind of subjects. In short: highly recommended :-)