We stayed at Maureen's apartment for 2 nights. The apartment is strategically located between the city center and the Prater: both at walking distance. Maureen and Cloud are helpful and easy to get in touch with. At check-in they provided us with a lot of useful information: they gave us tips about how to get around and suggested to go to Figlmüller restaurant, which was our best meal in the city :) We highly recommend their apartment.