I just saw it this week at the St. Louis screening, so it was free. I thought it was okay, but not great. I enjoyed the explanations of quite a few things that while you may see those creatures, are unlikely to observe the behavoir captured for the film. There were two parts that I thought were a bit 'over done'. I was disappointed in the 3D portion. That technology doesn't seem to have advanced as far as I expected. Perhaps the venue I was at was too small. I seemed to have to stare straight ahead or the registration seemed to fall apart quickly. I couldn't really 'look around' from corner to corner of the screen and keep a 3D feeling. My non-diving wife gave it better scores than I did.