We had a lovely stay at Mariella's place. Check-in and communication was easy with the help of Wladimir and Werner who helped us whenever we had questions. The apartment is quite big, beautiful and clean, and most importantly, close to a lot of really great places in Vienna. It is possible to walk to the Opera in about 15 minutes, to the Belvedere in pretty much the same amount of time, to the Museumsquartier in 20 minutes... And if you need to go a bit further, there are easy connections via metro and tram just a few minutes' walk from the apartment. All in all, a definite recommendation! Thank you for everything!