Great location -- literally steps from the main Stephansplatz, markets and restaurants. Large adjoining bedrooms, comfy beds, high ceilings. Kitchen has a nice eating area, with plates, cutlery and a few pots provided.
There is a shower with separate soaker tub; the toilet is in a separate room down the hall. Soaps, hair dryer, shampoos, towels were provided. The towels were a bit rough so might want to bring own face towels.
The elevators in the building (and in Vienna in general) are small so don't bring large luggage. Bring electrical outlet adapters for European outlets -- found some in the closet but only one worked.
Overall great place. Definitely much more convenient than hotel and better value. One member of the group was vegetarian so it was good to be able to go to the supermarket and pick up vegetables and fruits to cook and eat in some times. It was also handy to have washing machine so we could pack light!
Would recommend this place to family and friends!