I can't say enough nice things about Gabriele and her husband, Konrad. For US travelers, I don't speak German, and was very comfortable communicating with both hosts. I lived in their apartment for two months while on a sabbatical to write a book.
They helped me navigate to the apartment from the airport and were both there to meet me when I checked in. It's located in a very quiet neighborhood, conveniently near all major public transport routes. Gabriele and Konrad were friendly, approachable, and helpful. They gave me a thorough tour of the apartment and explained how everything worked.
They knew I was arriving early a.m. on a Sunday (when most stores in Vienna are closed), so they had a few food items waiting for me in the kitchen and refrigerator to get me through my first day—a very thoughtful, considerate touch.
The apartment was stocked with all the critical items you'd need (bathroom soap, dish soap, toilet paper, garbage bags, laundry detergent—the washer was a lifesaver!, and all the cooking supplies and utensils you'd need. I also came prepared to buy whatever they might not have had (I didn't have to buy much).
There are two main grocery stores within two blocks (< a five-min walk), multiple ethnic markets, and a very impressive Turkish "farmers market" another two blocks away. If you need it, you can find it.
The apartment was comfortable, especially the bed's memory foam mattress and pillow. I have a bad back and slept peacefully every night. The temperature was easy to control. I prefer it warm, and was cozy the entire time. There are two main windows in the living space that open in multiple directions for plenty of fresh air. The Smart TV has access to Netflix and all the other typical Apps. The toilet functioned without issue, and the bathroom was perfect for one traveler, with convenient outlets, good lighting, and no shortage of hot water.
While we weren't able to connect while there, Konrad also went out of his way to offer to be my driver during a side day trip to Salzburg. In lieu of being able to meet up with me, he gave great local recommendations for sights, eats, and drinks. He did the same for helping me get acclimated to Vienna.
I thoroughly enjoyed myself and would stay again without hesitation. Much respect and appreciation for Gabriele and Konrad! Highly recommend! Prost!