Everything was nice, the location is excellent (the tram stop is few steps away and there are 3 supermarkets in the neighborhood), the apartment was clean and cool, the ambient was sufficiently hot, the beds were perfect for 5 or maybe also 6 people, Nina was pretty helpful when we had some problem with the main door key and the self-check-in is a great idea and excellently useful; the only one flaw that I could think of is the lack of big towels to shower (there were 6/7 little/medium towels and just a big one for 5 of us). I would definitely recommend this apartment and Vienna is a beautiful city.