A truly excellent hotel. Great location, immaculate facilities, very friendly and professional staff, excellent breakfast, great coffee. Needless to say, it's not a 5-star hotel, but it's very hard to fault it.
At first, the hotel may look "a little odd", as it is based in a very modern building, and it shares the ground-level lobby with some offices. But it works very well. The reception is on the 2nd floor. There is a very spacious underground car park, with designated parking spaces.
The rooms are relatively spacious, and very modern, well sound-insulated. The aircon worked well (it was 32C outside). There are multiple and easily accessible power sockets available to recharge your phones, etc.
The restaurant is well spaced, and although it got very busy during breakfast, there was definitely plenty of excellent food and coffee for everyone.
Meidling Hauptstrasse train station is just 20 meters from the hotel. Schönbrunn Palace is only 2 block away, a 10-minute walk. The main shopping street Mariahilferstrasse is about 15-20 minutes away - don't bother, just take the train instead, and save time.
There is also an excellent cafe/bakery across the intersection (Der Mann) with great coffee, cakes and sandwiches. Highly recommended.
BTW, in case you have a roof box attached to your car, the car park height clearance is 2.5 meters.
We're already planning another short trip to Vienna next year, and will definitely stay at this excellent hotel again.