Sandra's place is generally great and is likely the perfect choice for many but unfortunately didn't work well for us.
We travel as a couple and work while traveling. We booked Sandra's place because it was large, showed a desk in the bedroom and a large dinner table in the separate living room, which would allow the two of us to work in different rooms. Unfortunately, the WIFI is veeeery slow and doesn't allow for any work use cases. At 5 to 15mbit/s speed you cannot join a video zoom call, download a file or (sadly) even look at maps/images without slow loading times (we measured multiple times at various places in the AirBnB on speedtest). The actual router is on the 3rd floor (note: you're in the basement, so 4 floors away in an old Viennese building). It's important to say that Sandra tried to help and set up two wireless extenders (on the 2nd floor and within the flat). But, you cannot extend slow internet into fast internet. We ended up paying $500 for a co-working place.