Oh dear. I bought the Extended Edition of David Lynch's Dune. I loved the theatrical release of the movie, but the extended edition is an awful Alan Smithee lash-up, rather than the hoped-for realization of the director's original vision. Mercifully, a decently remastered version of the theatrical release is on the other side of the disc, so it hasn't been a complete waste of money.
In the extended edition, some important scenes missing from the original (like the “Little Maker” scene) have been added, but most of the additions add little value. The early part of the movie has been ruined with what is essentially 10 minutes of a rostrum camera wobbling its way over a handful of painted stills, accompanied by some guy's voice (who also replaces the Princess Irulan narration throughout the film). It's a bloody travesty. They've also messed around with the music soundtrack.
Actually, this post is beginning to make me angry all over again. I'm going to stop talking about it now. Just don't waste your money.