I've done this trip twice before (and would be on this one as well, if only my schedule allowed it) and thought it was an amazing experience. Not only do you get to do all the world-renowned Cocos dives, you also get to contribute to conservation research, AND trips are tax-deductible (at least in the US).
For more information please go here: http://www.seaturtle...cle.php?id=1703
-Gina
