I've had more than 60 AirBnB visits, and this is the best of them all.
Everything is excellent:
Great close-in, walkable location to Hofburg Palace, Opera, many restaurants, Metro & StreetCars & Busses;
Most comfortable Old World apartment with every new, modern appliance (except dryer, but there's a drying rack);
Gracious and kind and welcoming hosts who respond almost immediately;
Two supermarkets nearby (one minute and three minutes on foot);
TV with NetFlix;
Bath tub, separate spacious shower, infinite hot water;
Spotlessly clean;
BIG apartment, elegant !
I visit Vienna repeatedly, and this will be my only future choice. It's moderately priced, not bottom basement budget, but what's offered is top flight.
Thank you, Edit and Dieter !