We had a lovely stay in this apartment! It was spacious and had all the basic necessities. We were able to check in earlier than 3:00 p.m., which was a blessing! The check-in procedure was very straight forward. The beds were a little on the soft side, but all else was up to standards (aside from a smelly - but clean - bathroom).
If you come with a baby, please be aware that although possible, the elevator is on the smaller side for a pram. Otherwise, there was a high chair as well as a crib, and the apartment was close to the Prater, as well as a lovely neighborhood park, so all in all it's very baby friendly!