A small mishap with the booking meant that I eventually had to stay at a different apartment, but Stefan was the most accommodating host-to-be one could wish for. He called me immediately abroad and offered me several excellent alternatives. He then booked the apartment of my choice and handled all the practicalities for me. In the end I could stay in an apartment, which was even closer to the conference venue, where I had to go, larger and generally more convenient for my situation. He even checked on me after my arrival to make sure that everything went well! I can warmly recommend him as a host and if I'd come to back Vienna I would not hesitate to book with him again.