Just returned from a week at the Haus Wilhelmina... And already booked for next year!
Lovely people, perfect location for the CityExpress lift, ski hire, the ski bus for Sonnenalm and the town centre. We also used the card for the swimming pool and sauna a number of times.
We stayed in apartment 1 which is perfect for a family of 4 (with young children) with 2 bedrooms and a small kitchen diner.
We also love the Kupferkessel restaurant on the Bruckerbundesstr. near the station - one of the best restaurants for families we have ever been to.