Kiki & Mary were the nicest hosts and quick to respond. The instructions how to get into the apartment were easy to follow and it was great that we didn't have to wait around for somebody to let us inside. A big plus was also that there is a public parking lot right across the street that doesn't cost a fortune if you come to Vienna by car. Furthermore the apartment was super clean and there were towels, coffee and some water waiting for us. Additionally the apartment has a safe, a TV and a nice kitchen if you don't want to eat out every day or prepare something to take with you (a supermarket is just a few steps away). While the apartment is not directly in the old town it's only a few tram stops away and it was super easy to get around and to all the different sights. I highly recommend staying with Kiki & Mary and we will definitely keep it in mind to book again if we should ever come back to Vienna in the future.