This place was spacious, clean and very well equipped. The building itself was very interesting. Being an apartment in a palace most of the rooms are very large. If bringing a large party, look at the room layouts to make sure that it will work for you. It worked very well for our party. The location is excellent, very close to a tram stop but in a quiet neighbourhood. There is a supermarket close by as well as a brew pub that did really good food. It was also very close to the Belvedere Palace.
Our host was very helpful providing us with information about staying in Vienna and the best way to get to the apartment from the airport. Also he made sure that we had the number of sets of keys that we needed and provided an extra power cable that we had asked for in advance.
I would thoroughly recommend this place for a stay in Vienna.