My comments on this
Just saw this the other day on the big screen. Very enjoyable, a little slow in some places. Maybe theres one too many shots of crashing waves? Never watched the trailer but IMO the title is a bit of a misnomer (open to interpretation I suppose) - they don't really spend enough time "under" water. Also, I was hoping there would be more narration/technical info but I think that might have taken away from the beauty of the gorgeous shots.
Overall, I would recommend this if you get a chance to see it on the big screen. However, catch the matinee show ;)
"I talk to god but the sky is empty"
SP