Very spacious, very clean, great location and the air conditioning was wonderful for a couple of those August nights. As primarily English speakers, relieved that both written and verbal communication was excellent.
View of Karlskirche at different times of was cool, and as a home base from either walking the circle, visiting the Belvedere, or getting to the Wien Hauptbahnhof transport hub for a rental car to get out of town, this was perfect for our five night stay. Note that arriving on a Sunday is not advised if you need cooking or sundry items, unlike USA, stores are closed. Enjoyed many outstanding restaurants nearby.