So beautifully shot. A non anthropocentric story, with echoes of ethology and ecology. The only truly good movie with animals I can think of that does not exploit them and makes them silly, by anthropomorphic comedy or unrealistic plot situations. The cub, though, at times seems to have some excessive vocalizations, but it's a detail that does not hurt the enjoyment of the story.
Purely from a technical POV, it's an amazing accomplishment. This grizzly bear on screen is far more believable than anything a digital coven can produce, yes, even in 3-D. Of course, I'm not sure a purely technical POV isn't just an apologist's strategy to champion a so-so film.
Pictures tells more than words sometimes. Great use of REAL bears interacting together with humans in a story of a real infant bear trying to survive alone in the big wild. More beautiful and exciting than thousands of films with only humans. This kind of movie will not be possible to do anymore and the bear would all be a fake-looking CGI effect or a stand-in actor in bear costume. One-of-a-kind fantastic movie.