Excellent: a wonderful apartment with generous hospitality from Robin and Marc. High ceilings, wooden floors, white walls, lots of natural light, super clean, architectural plants and a slightly Japanese aesthetic. Having my own shower room and toilet was good. In terms of location, I appreciated staying in a residential neighbourhood; the apartment is around a seven minute walk from the U-bahn, and public transport in Vienna is cheap and easy to navigate (and Citymapper makes that very simple).