The Vienna Ap-Art-Ment is easily the nicest looking AirBNB I've ever stayed in, and Jan Eric was helpful accommodating a late check-in (although there was a fee, which was noted in the rules beforehand) and very friendly. The place itself is gorgeously decorated and very spacious and clean. It's a little bit far from the city center, although still walkable. We were only in Vienna for an overnight layover, but when I return I will definitely stay here again.