This is a TERRIFIC place in every respect.
First of all, very fair pricing.
Location near (about four minute walk) to two tram lines, 5 minutes away from the transportation center of the city (Wien Mitte) and its City Air Train that takes you between downtown and the airport in about 16 minutes, and about 15 minutes' tram ride from the Main Train Station (Hauptbahnhof) from which you can go anywhere in Europe! Near to food store, bakeries, three or four restaurants, hair dresser, pharmacy, beauty aids/health store, etc.
Quiet apartment building and neighborhood, roomy, comfortable, very clean, comfortable beds and couches, nice modern kitchen and bathroom, charming fireplace - with wood provided free. In short, after a four-week stay in this place, we would recommend it highly and would immediately return if and when we visit Vienna once again. Bravo to Wolfgang and Christine for being excellent and helpful hosts.