The apartment is fine and has everything you need for a short stay-over. If you are there over the weekend (like us), the parking is free and easy to find available spot. So no need to book the parking.
Rene, the host, was very responsive and friendly.
The apartment is not located in the "coolest of the neighbourhoods" in Vienna, a bit out of the center. If you are there for a weekend and by car, that is not really an issue. Although it is in pretty "industrial" area and next to the road, it was silent.
So, if you are looking for a place to just sleep over, it is completely fine.