Whilst we didn't meet Christian his communication was excellent. We were a family of four. there was one bedroom and one pull out bed in the lounge. The apartment was fabulous and he was so thoughtful and put in a couple of fans given we were there for the hottest weekend in 10 years in Vienna. Great location with a supermarket nearby to get groceries. In general it was a really great location as was easy to walk and discover cool little places off many of the side streets etc. It was a nice touch that Christian had little treats that you could buy if you wanted to as well.