We stayed in this apartment for 2 months. Vera and Marcus allowed us to check-in earlier that was really kind.
The overall flat is fine especially if you plan to visit Vienna for a short period. There are some issues that can annoy you, but it mostly applies to those who are gonna have a long stay.
The apartment is located in a great area: next to a big supermarket and close to a park.
There is everything that you need for cooking in the apartment, washing machine, nice coffee machine and there is also a bathtub.
Hosts are helpful and reply to every message really quickly.
Dust allergy information. I felt more or less fine in this apartment, but you need to keep in mind that there are feather pillows and blankets.
Digital nomad information (or long-stayers).
Good: Internet connection is super fast, enough place for yoga and home workout, a big table in a living room for a workplace, a huge TV, comfortable mattress, you can regulate the temperature in the apartment.
Bad: we bought our duvet and pillows because those that were provided smelled of tobacco and were kinda dirty, refrigerator leaks a bit (so you need to wipe water from the bottom of the refrigerator once a week, it was really annoying), washing machine is loud, the toilet is a little bit creepy (clean and fine but old, during the weekend there is usually smell of cooking coming from the neighbours). There's also a window with a usual transparent glass in the bathroom, but it faces the inner courtyard.
Conclusion: we can recommend this flat for travellers, for digital nomads is a great place too just don't expect too much.