Apartment was very clean, well-appointed, about one block from Keplerplatz metro station. It was very easy to get to the tourist areas of Vienna like we wanted.
The apartment is good sized and the beds were excellent. The apartment is on the third floor, so lots of climbing, and the whole rest of the building seemed to be empty, which was a little creepy at night. On the bright side, that also meant it was quiet and it was absolutely safe.
Mario was quick to communicate and everything was seamless.