I was totally blown away by this and it really felt like you were there, scuba diving in the ocean at times! The long tracking shots draw you in and allow you to really get a sense of depth. I was surprised at how the 3D effect came towards you and sea creatures like the turtle, floated in incredible detail, above my coffee table!
I was amazed at how the whole scene leapt out of the TV screen, as I had been told that it was more a case of the depth behind the screen. But with this, a lot of the action is in front of the screen - the nature of the material enhances this with the feeling of being surrounded by water.
The coral is presented in incredible detail and the experience of seeing fish hidden amongst tendrils was enhanced by the 3D depth. This just wouldn't have been the same in 2D. Some may see 3D as a gimmick, but in presentations like this, it really makes a difference.
As other have said this is too short and you want more - but it is also the ideal introduction to 3D - a demonstration of what it can do. In that context, its length is ideal and means you can make sure you take a break, as the experience is so immersive, you can forget where you are!