The visuals and cinematographic efforts in this are terrific, including some angles that I personally hadn't seen before, despite it not being particularly groundbreaking subject wise.
The narration however was absolutely abysnal, to the point of having to stop watching half way through. Forced, over-dramatised narration, bringing some sort of ridiculous 'good and evil' and even slightly feminist tone to these animals and ecosystems, which by definition couldn't care less.
Recommended visual watch, if you turn the sound and/or subs off, but who watches a documentary without sound. If this existed without narration, it would be 10000% better. Sorry, but this is by FAR the worst narration I've heard in a long time!