We spent 9.5 months in Klemens' flat and we had a great time there. We are a family with two toddlers and although the flat is not designed for so many people it felt spacious enough. The location is fantastic with the metro and tram stops within a couple of minutes walking. Rathaus is ~15min walk away. Josefstadt is a wonderful district with "old Vienna" spirit and the local amenities are plentiful, from food and diapers shops through nice playgrounds to gourmet coffee and craft beer. The flat has pretty much everything one could possibly need. Although some of the equipment is showing its age it is still exceptionally well equipped for an airbnb flat. Klemens is a very good host. The communication was quick and pleasant, and he was very helpful in sorting out the few issues that arose during our stay. I would not hesitate to recommend Klemens' place to anyone visiting Vienna.