A perfect place for a nice relaxing stay in Vienna. You can easily walk from the apartment to the city center (about 20-25 minutes), to Belvedere Castle or Vienna's train station (about 10-15 minutes). But there's also a subway station just down the street. The studio is calm, cosy and fully equipped. Even though I did not have any major issues during my stay, Dada was very nice and responsive.
The automated check-in is also perfect if you plan to arrive late!