Julia and Chris are so friendly it was like staying with someone I knew well. They have loads of great tips on restaurants and their apartment is trendy with lots of great art, I was inspired by Julia's framed posters from the Albertina gallery (a must see for contemporary art lovers visiting Vienna) and bought some myself to bring home. The location really is ideal and I didn't even need to use the underground very much and walked everywhere. Overall a perfect place to stay and I slept very soundly in their quiet space at the heart of the city.