Katharina was so accommodating! My husband and I were driving in to Vienna from quite a distance, and a large truck overturned on the Autobahn and then caught fire, so we were delayed by FOUR HOURS. Katharina waited up for us very patiently, and it made all the difference. The apartment was also really enjoyable. It is located about a 1 minute walk to the river through a walkway near a hotel across the street, and there are several nice cafes and restaurants along the river, as well as in the surrounding neighborhood. We were also able to get up in the morning and run the dog along the river path, which was very dog-friendly. It was wonderfully situated so that we could walk to everything in the city, but be able to retreat from the bustle to a quiet neighborhood in the evenings. Also, in the summer, the A/C was a pleasant treat that my husband and our dog were truly grateful for.