I am a repeat customer.
Andreas' modern, updated apartment is in a grand old, historical building. The neighborhood location and transit connections are superb.
Andreas is a great host; last time he put me on to the oldest Heurige, "10er Marie", (wine house) in Vienna, which is just 2 blocks from the apartment. It's like being in Grinzing, only closer in. Just one of his many spot-on recommendations. The inhouse "Ottakringer Stub'n" can also be recommended for very good Viennese & Austrian cooking.
The apartment is centrally located for many of Vienna's sights. First off it is only a few minutes walk from the U3 (underground) which can take you to Stephansdom in under 15 minutes. Trams #44 (at you door) #46, and #2 whisk you to various locations on the Ring Strasse or in the case of the #2 takes you around the Ring. Bus #10A takes you to Schoenbrunn.
And did I mention that the apartment is large and very affordable. Only drawback, for older patrons, No Lift.