I visited Wien for a conference. The house was clean and had everything you need for a pleasant stay. The balcony catches the sun for most of the day and it is lovely to eat outside overlooking the city.
Vienna CityBike hire is round the corner and you can register for 1 euro then use the bikes for free to get around the city. There are cycle lanes everywhere.
Dorothea is friendly, welcoming and polite. She speaks many languages and I hope she enjoyed my company as much as I enjoyed hers.
I would have happily stayed there much longer.