+: Perfect location if you want visit Kunsthistorische & Natural museums, walk at city center, near Rathaus/Parliament, drink a coffee at Central Cafe or have a lunch at Landtmann Cafe.
-: if you are coming by car (like me) in Vienna, be ready to pay 20EUR/day. Also think that cleaning fee is overpriced in the apartment, as I belong to pedantic persons who tries to keep rooms clean all the time.