First, the good thing - the location of this place is AWESOME! It is right in the heart of Vienna, steps from the Danube, lots of restaurants, bike share, and shopping.
Mostly, though, I wasn't pleased with the accommodation. First off, the internet was non-working, so I had to use my international data plan while I stayed there, and that cost more money and was inconvenient. Also, the room is at the top of a 4th floor walk up. That wasn't noted in the details of the apartment (I even looked when I got back home), so beware that it is 4 flights up a very windy staircase. I also didn't get directions to enter the apartment before I got there and had to call Rainer. By that time, though, I had gone up 4 flights of the wrong staircase with all my luggage. Rainer walked me through where I should be (he was not home - in fact, I never saw him the whole time), but it was inconvenient & tiring to climb all those stairs.
All in all, I wouldn't stay here again - there are other AirBnBs that are in the city center like this one - but if you are looking for something convenient and not much else, this is your place. :)