If you're an animal lover, you will have a very hard time watching some of this.... They focus a lot (too much for me, I had to forward past most of it) on animals killing animals .... It's understood that "everything needs to eat", however, showing the process and torturous death that one animal has to endure to feed another just goes against one of the main reasons behind this type of show : for people to fall in love with the animals and want to conserve them.... Seeing a Killer Whale hunt and kill, particularly a baby whale, in high def detail does the exact opposite for most folks. There is so much beauty in the natural world, there is no reason to be so obsessively focused on showing the cruelty- particularly if you're not going to warn your audience that some of the material you find so fascinating in your scientific detachment is actually quite upsetting.
Also had to fast forward through much of the tech stuff.... Easily half the first episode, for instance, focused on the technology.... Most viewers want to see the amazing underwater "stuff" not listen to you go on and on about the tech. I get it, it's amazing and groundbreaking, but, to focus on it for half the episode frankly gets boring.
Definitely wouldn't want young kids to see this; they'd likely be in tears. Those who can't stomach seeing the cruelty of the natural world, be warned.
Honestly came away from the first episode thinking that scientists and some nature filmmakers just have no heart with the way they talk about and get excited over a living thing getting killed in such horrible drawn out ways.
Worth watching on a platform that allows the viewer to fast forward. Would give 10 stars for the cinematography, 5 stars overall due to how the episodes are put together, and there really should be a disturbing content warning with some of what's presented.