Anyway, it goes into how the country was the only place they could possibly shoot, focusing on Hobbiton: filming it from the air now that that's possible, building and reconstructing sets, how it's really there with no FX enhancements necessary(...no, really. They said this about arguably the most over CG-ed movies in recent memory), the beauty of nature(unintentionally making a strong case for environmentalism, actually respecting nature, you know, crazy notions like protecting what's keeping us alive, if for no other reason than to, y'know, prolong our own existence). It consists of a series of short interviews with crew and cast(some of whom are all but unrecognizable out of make-up, costume and character, clips of the films, behind-the-scenes footage, pre-visualizations, green screen footage, and the effects are further gone through as we see partially complete ones.
There is a nothing objectionable in this. I recommend this to anyone interested in the subject, as it's quite concise and detailed on it. 7/10