We had a great time at Dominik's place. He is very friendly, communicative and informative. The apartment itself is super comfy - clean, spacious and full of accesories. The location is superb: 6 minutes walk from the metro and very close to the center (2 or 3 stations to Landstraße and Stephansplatz). You can even walk to Innere Stadt for about 30~ minutes. The area itself of Löwengasse has nice restaurants, Cafès and pubs. It's truly great to just walk in the area.
Overall we had a marvelous time in Vienna, much thanks to Dominik and his apartment. Excellent choice and we highly recommend it (will definitley come again).