We didn't meet Stefan personally, but it was very easy to communicate with him via text. The apartment itself is spacious and conveniently located for exploring Vienna. Light sleepers may be bothered by the traffic outside, but my parents didn't find this to be a problem. As others have noted, the second bedroom also functions as a dining room, so those wanting additional privacy should keep this in mind. Our only major complaint is that the shower is badly designed. Overall, though, a great place to stay.