I have booked a day at the Great Barrier Reef with Great Adventures, which is also part of the Quicksilver company. There are so many reef tours, I'm getting confused (Reef Encounters operates under a similar name, but appears to be a different company). These guys list their address as P.O. Box 898 Cairns Qld 4870. If anyone can confirm that this company is good, I'd appreciate it (I'm booked for the Green Island/Outer Reef Adventure, $198). thank you for any information!