My wife and stayed here 07/01/2013 to 11/01/2013 for my birthday and we had an absolutely marvelous stay. It is everything you would expect from a five star hotel.
Every single member of staff is helpful and friendly.
From the moment we stepped out of the taxi upon arrival to the moment we left we felt as if we were valued quests.
We had a standard double room which was elegantly appointed, spotlessly clean and very quiet. The room had plenty of storage space and a safety deposit box (which was free).
The hotel is in an excellent location within walking distance of every thing you go to Vienna to see and do. Two minutes to the Stadt Opera, five minutes to the Hofburg and five minutes to the main shopping areas of Karntner Strasse.
If you intend visiting the Belvedere for the Gustav Klimt paintings, rather than walking all the way up Prinz Eugene Strasse, which is a bit grotty, you can enter via Rennweg which is much closer to the hotel.
We will return to Vienna as it is a beautiful city and we will certainly stay at the Grand Wien again.
I cannot recommend this hotel highly enough.