My wife and I have not been on many cruise ships, preferring independent travel and small venues over the crowded, packaged ships we see so often in port at home (San Francisco USA). The sailing on the Coral Ex II for 4 nights on the Great Barrier Reef appealed to us due to the itinerary, size of the vessel and, of course, the chance to snorkel and dive on the Great Barrier Reef.
My rating of Excellent stems from a nearly flawless experience by the ship's crew and the fact that all our expectations were met or exceeded on this cruise. We only booked the 4 night sailing, which has an extension to a more southern itinerary for 3 additional nights, and regret not booking the extension!
To be specific, embarkation was done in Cairns, Australia, which is one of the largest towns in Queensland and we spent a few days enjoying the tropical atmosphere (Botanical Gardens were wonderful), and seafood. The Esplanade was an area for strolling and relaxing prior to our cruise.