Aigerim and her flatmate were very flexible in check-in/out. The flat is very unique and even though it is just a room you can have your own bathroom, closeable (!) room with lil balcony - so much privacy and silence. We were their first guests and it is highly recommended. It is not central but Vienna airbnbs are overpriced compared to this one and a tram brings you door to door to the Opera in 15 minutes.