Cary,
I played Royal Adelaide on my Australian tour last year, and while it is a good golf course, I'll admit to walking away wondering what all the fuss was about. Perhaps after sampling the Melbourne 'Sandbelt', the Mornington Peninsula and the pair of Doak/Clayton designs, Royal Adelaide had a tough act to follow.
I loved the fact that the train ran through the property regularily, and of course, the layout features many excellent golf holes, and only a few boring affairs. Mostly, the course is chalk-full of soundly designed holes. Further, the long, narrow-little mounds that defend both short par fours (#3, #8) were an interesting design element that I had not seen previously.
That being said, I found the greens to be relatively flat, or featured a single prominent slope which made them less interesting in terms of finding alterative routes for recovery strokes. A great example of this is the 'Crater' hole (#11), a simply brilliant green site, but unimagintive contouring, which dampens my overall feelings for the hole. Further, the bunkering, while functional, is for the most part, bland. Some may argue that is purely aesthetic and doesn't affect the golf, which is true, but it does affect the experience.
Further, when in Adelaide, check out the Cleeland Reserve, an opportunity to get up close and feed Emus, Kangaroos and Koalas and see the Tasmanian Devil and a variety of poisonous snakes (I even saw the last 2 ft. of a black one slithering into the bushes at the Kangaroo enclosure).
TK