My God, QFT. I am a huge fan of the Dune novels (the originals by Frank Herbert, not the crap churned out by his son, Brian), and the movie was essentially sacrilege.
I disagree.
Dune is a book that I think just isn't screen worthy, even for a tried and true director of epics, which Lynch certainly was not. There is just to much subjective stuff in these books, and a ton of contemplation the characters do in the boo came across as ham fisted or gimmicky in the film, as Lynch had to overuse voice over to the extreme. Event a brilliant cinematic story teller would have had trouble nailing this picture down.
That said, and I have read
Dune multiple times, I thought Lynch totally nailed the tone, better than anyone would have, really. Tone is Lynch's forte, and I think he delivered in spades. Unfortunately, Lynch's cut of the film clocked in at around four hours, and I wonder if he had captured more of the story in that original cut. The studio butchered the film so much, in an attempt to bring the time down to their target, so much so, that Lynch eventually asked to have his name removed from the credits.
It was a lofty goal to begin with, one that needed everything to work just right. Lynch was not experienced enough to take on a project of that magnitude. The film was a failure on quite a few levels, but, on other levels, it totally works.