My friend and I stay in Christian's apartment for two nights. We find the apartment is very comfortable. There is enough space for two people. There are all essential applicants in the apartment, and everything is easy to use. The apartment is well located we can walk to Naschmarkt and museums by foot (ca 20 minutes). Christian is also very helpful. His instructions is clear. The check-in and check-out are easy. And he is reachable if we need him. I recommend his apartment for people who want to come staying in Vienna.