It takes around 15mins walk from vienna HBF to the apartment, or around 6-8mins walk from the closest metro station (given you have to cross a number of traffic lights). The apartment is located on the ground floor and is a bit small for us (4 in total).
Fernanda is kind enough to let us store our luggage and give us the key earlier than the check-in time.
The bunk bed on top is sufficient for one person’s stay, but we eventually decided to sleep on the sofa bed instead since it is a bit difficult to climb up the stairs.
Since it is located in the ground floor, we can hear the car passing by at night and even people walking on the street. We realized the next day that there is a gap in between the window where people on the street can actually look into the bedroom directly.