Incomprehensible if you haven't read the book, and a disappointment if you have. The type of sweeping, beautiful disaster when a creative team tries to condense an epic, zillion page novel into a two and a half hour movie...and everyone is so exhausted they go with the first re-write. A flawed screenplay adaptation that takes itself even more seriously than the book.
While it is visually stunning and sometimes feels ahead of its time... its also big and goofy, like most of the cast's hair.
Kenneth McMillan, as the evil Baron Harkonnen, would occasionally shock life into a movie of dull, uncomfortable performances by people we don't care about doing things we don't care about.
Lynch captures the cold, grim, dark-ages feel of this futuristic empire; but most of his tweeks don't work and come off as spoon-fed maniacal and cartoonish, i.e. the Baron Harkonnen is evil because he is oozing puss, not from McMillan's stand-out portrayal. Lynch misses the mark with the witches, the Fremen, the Mentats, Alia, the Guild members, and the hilariously fake looking worm-riding. (Yes, that's pretty much everything!)
If you are a fan of the novels and trying as hard as I was to love this movie, Lynch's final stake in the heart adaptation is a beyond corn-ball "Messiah none of us care about has come" rainfall ending that confirms the entire experience as ridiculous and ultimately prevents Dune from attaining a kind of dark sci-fi classic status.