The David Lynch movie had great art direction, but otherwise it was aweful. I remember seeing it in the theater when it came out, and there were half a dozen unintentional audience laughs -- the worm-riding seens, some of the dialog that just didn't work right. The screenplay was bad, they obviously couldn't fit the book into two hours, but they didn't seem to realize this until an hour into the movie, when it suddenly began to rush over stuff with narration and flashes of quick scenes.
The miniseries had a good screenplay and enough time to tell the story. Obviously not a huge movie budget, but you can do great stuff with the talented artisans in the Czech Republic. And they all have a convenient "Freman" accent! William Hurt and lots of the cast were fine.