Rainer seems to really know his stuff around Vienna. He was communicative and attentive all throughout. We had the misfortune of visiting when an electrical issue caused hot water unavailability which made our first few days perhaps not as comfortable as we would have hoped, but these things happen and I found Rainer very professional, fair and accomodating through it all and could not really ask for more under the unforeseeable circumstances. He furthermore gave us many helpful visitor tips which made our trip more agreeable and the apartment is, from my perspective, on par with the descriptions and really well located, a great compromise between being close to the action of the city center, public transportation all the while being in a quiet immediate neighborhood. Even though Vienna is a city with a lot of choice, I would recommend this flat to friends.