My partner and I stayed at this place for 4 nights and we really enjoyed it. The apartment is tiny, but the way the square footage is used to create a comfortable living space is exceptional. All the amenities are there apart from a washing machine. The bed is huge and really cozy.
The location is really nice, too. Walking distance from Schönbrunn so you can explore the huge park and palace; numerous grocery stores including the one at the gas station nearby, so it's possible to buy stuff outside of regular shops' working hours. Trams, buses, and two metro lines are also nearby.
The check-in was contactless and very easy: Nedjeljka sent us a detailed instruction on how to enter the apartment, and we didn't have any trouble and have done everything at our pace.
The only downside is that the apartment is on the ground floor, and you can hear pretty much everything that's happening outside. The heavy dark curtains certainly help, though.
Overall, a short stay for two people was a really good experience.