Birgit and her husband Walter were incredible hosts and their BNB made our trip to Vienna outstanding. My girlfriend and I arrived quite late (around 12 AM), but they were very accommodating to our late check-in. The BNB itself was incredibly cozy and fits two perfectly - do note that the shower is in the kitchen and that the toilet is in a separate room down the hall (we didn’t find this to be a problem at all, both the shower and bathroom were in top condition, with shampoo/conditioner and soap all provided).
It’s located in a great area (5 min walk to the U3 train line, which gets you to many of the main attractions in Vienna in ~12 minutes). The BNB is accessible by train/bus from the airport or by taxi/Uber (around a 30-35 Euro ride).
Finally, on our day of departure, Birgit was kind enough to extend our check-out time, which gave us time to get lunch in the city before coming back and heading to the airport.
Would highly recommend both the BNB and the hosts! They were incredibly accommodating, kind, and responsive to all messages and the space itself is wonderful for the price.