Thanks for the report. I had booked the Danube Hilton, then the Vienna Hilton opened up so I changed. We'll be there next month.
I know the Vienna Hilton's rooms are smaller, especially the bathrooms (ugh!), but it's an old sentimental favorite of ours, especially because my husband used to work there when he was more youthful. We'll have dinner at the Vienna Plaza one evening as Werner Matt was chef at the Prinz Eugen restaurant in the Vienna Hilton when that restaurant was wonderful.