I really loved my stay in Vienna at the apartment. It was super easy to get to central from there, about 15min and the metro is really close by. The apartment is very big and airy, clean and cool inside. We were 3 and the space was really big. The hosts have been great, providing a lot of information and recommendations, as well as answering super fast and checking up on you. Definitely recommend and will stay again if I come to Vienna.