Highly recommend staying with Shelley! The location is 50 ft from the metro right in the center of Vienna, 5 minute walk to St Stephan's and 10 minute walk to the Hofburg Palace. You can walk to all the major sites in <15 minutes. Her dog and cat have very mellow, friendly, and sweet temperaments and warmed to me in minutes (yes, even the cat!) Shelley was very social and welcoming.