Rainer was a great host who offered advice and was wonderfully flexible with check-in and check-out-times, when possible. In the apartment there was a good selection of guides and maps and suggestions as to where to go for the Vienna first-timers. The house was as promised and the pictures provided are very faithful to the actual flat. For the two us it was super spacious. The neighbourhood seemed nice and quiet, away from the very central but still it was really easy to walk to the main attractions and the metro and trains were also very close by.
I would definitely recommend Rainer and the Urban Studios, we had an amazing time!