Is "Avatar" worth to watch

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I heard a lot of people discussing about this movie, and i watched the trailer before. It seems amazing with those advanced 3D technology. One thing surprised me is that the direct hired some linguists to create a whole new language to those aliens. And they named all animals,plants and stuffs with their language. They seems gonna publish a three hundred pages book which contain those details on that planet. Did you guys watch that? How do yuo feel?