I was there in August 2004.
When you first enter in the main lobby, you are impressed from the luxury of the hotel, but this is just a 4 star hotel.
In the room you have: telephone, TV, Radio (2 special channels in the TV), minibar, a lot of space in the wardrobes, desk, 3 sitting chairs and a small table (about 1 meter x 0.50 meter), a hot press for pants and a safe.
The WC was separate from the bathroom, in which was a bath tube and a bidet (useful to clean your tired feet after a day walking in Vienna! ;-) )
All the towels (2 big, 2 small and 1 carpet) was changed all the days if needed. There is also a laundry service, but I not used it.
Soap is available in two useful dispensers.
The minibar is locked by a key which is given to you in the same keyring with the main room key. Since the minibar is big enough and it is not automatic, you can use it to store your food. I bought tomatoes, ham and cheese and the minibar was VERY helpful.
There is no air conditioning system, but I can assure you don't need it.
My bed was a king size, and for king I means KING! It was hard and with four pillows; probably one of the most comfortable bed I ever used in my trips!
If you travel alone (not with an organized travel group), you have a separate breakfast room (which is better in my opinion).
Here you can found all you need: fruit juices (orange and others), tomato juices, hot-water and tea-filters, coffee and milk (just ask to the maid), tomatoes, vegetables, a good selection of hams and cheeses, sausages, scrambled eggs, fresh fruits, butter, margarine, bread (ABSOLUTELY TRY IT!!), cakes, 3 different yogurts, honey, 6 different jams, peaches in syrup and other...
The breakfast starts at 06:30 and end at 10:30
Unique Quality: In the hotel there is a free swimming pool (12 x 6 meters) which is almost free of people at noon. The opening time is 7:30-19:30 on the weekdays, and 9:00-19:30 during weekends.
There is also a sauna (probably free, but I'm not sure) and a massage service I not experimented, but it was 8 euro per 10 minutes or a lot cheaper for a 50 minutes service.
There is also a beautiful garden where you can stay.
The hotel is in a FANTASTIC location. You have one side entering to the Schonbrunn gardens. You have just to cross the street in front of the hotel and walk for less than 50 meters to the right, in direction of the church.
If you walk to the left side without crossing the street, you pass in front of a parking garage, a Sisley shop, a patisserie with ice-creams and a few shops.
The underground (U-Bahn) station U4-Hietzing is on the opposite of the street at about 200 meters from the hotel. Here you'll found buses and trams too.
Depending on you final destination, in a time from 10 to 20 minutes you may be in any point of the city.
Directions: Take the U-Bahn U4 and go to the Hietzing stop. From here, follow the signs to the "Hietzinger Hauptstrasse" exit. At the exit, just look to the left and you'll see the hotel. You have just to cross the street.