I will not go in depth of describing the qualities of these films, as this has been done by many people before me and probably in a much more coherent and descriptive way.
However, I will say that although the films were shot quite a number of years ago, they are as necessary today as they were when they were shot.
Please watch these films, but also please take your time and just immerse yourself in what these films show. The imagery is stunning, and some of the things that you realise about the world, about other people, about yourself are just unique.
Along with the Qatsi trilogy, they stand as landmarks in the history of film-making, creating a genre of their own and being the grandfathers of a lot of films you see today (such as the recent film "HOME", available on YouTube).