We stayed in Walter's apartment but our contact person was Thomas, a very warm, friendly and welcoming person. The apartment was lovely, spacious and very central. The trendy shopping area is a 5 minutes walk as are the closest train and the museumquartier. We were travelling with our toddler and the apartment had everything we would need and plenty of space for our little one to run around. Thomas was extremely helpful and patient and introduced us to Vienna very well. It was clear to see that he cared to make our stay a good one and that he is passionate about the city. We would highly recommend the apartment.