We stayed at the Schloss Fuschl last summer. Wonderful location for the property, and the Platinum amenities were very generous (included a half bottle of champagne, and a fruit plate). However, these advantages were very much offset by the truly tiny room we were placed in.
Also, the stay was memorable in that the Mrs was utterly dismayed when we came across a snake attempting furiously to crawl into the sauna on a visit to the Spa.
It may still be there, so if you decide to stay there, step carefully into the sauna. ;-)