If you want to be on the outskirts of Vienna and don't mind a 40 min ride by public transportation, than this is a good choice. When the weather is good you can take endless walks and enjoy a good glass of wine and some great Austrian food on the way back.
Be aware that there is not much to do and there are no stores within walking distance! A cab ride to the inner districts will run you about 20 Euros.
The hotel is clean and nice. We found the beds to be a bit hard, but not too uncomfortable. The breakfast is nice and the 24 our restaurant service could be a nice convenience.
Find the time to walk a few hundred feed to a Heuriger called Zeiler, and have the Backhuhn with potato salad there. It's to die for.
Overall we had a nice stay , even though I have to say it's not a 4 star property in my opinion. I would think 3 star would be more accurate.

The staff was very kind and helpful. The rooms were spacious and well designed with luxury bathrooms. The breakfast was excellent but the breakfast area was marginally adequate. Though it was not near the center of the city the transportation was very good and it was very easy to get there.

The hotel is located in Grinzing - a more rural part of Vienna with many local wine yards ("Heuregen").
They also produce their own wines, one can buy them directly from the room.

The room was very spacious for a "standard room", and well furnished.

When the windows look on the street, it can be a bit noisy.
In the morning on working days, relatively large amount of car passes by, going towards Vienna city center.

The breakfast assortment is adequate, it also includes typical foods they serve at Heurigens.

Very pleasant hotel with good room and outside the city centre so easy for access by car but on a simple bus/metro route into the city. Staff extremely helpful which meant we managed to get to see a concert which otherwise would not have been possible. Many thanks. Breakfast excellent. Wine garden just down the road was great value and very charming.