It was an interesting movie (sold out theater!). SeaWorld backed out of their planned on camera interviews with the film crew, so of course it is only one sided. Not really a big deal as documentaries, by their nature, tend to lean one way or another. Some of the stuff like the small holding tanks or lying about animal facts to guests can't really be argued.
Anyway, it is not like this is a new issue, it is just that sometimes it takes a movie or other big action to get the general public involved, instead of just the fringe groups. I personally am a SWO/BGT annual passholder and love the parks, but I don't deny they could work on some areas. I am sad to see the concerts cancelled, but at the same time it might bring more awareness. It is a sticky situation.