Chris was incredibly accommodating with my arrival and departure, gave me a second key on request, and showed me how some things in the apartment worked (nespresso, vacuum cleaner, AC). He replied to all emails almost immediately.
The apartment is an incredible find: great location - just a few minutes walk and you are at Karlsplatz or the Naschmarkt!, beautiful, feels spacious. The option to use air conditioning on some of those super hot days in July made a tremendous difference.