Re: Films - meh
I thought the Dune film was OK when I saw it, given what it had to squeeze into a small amount of time (though I had the advantage of having previously read the books)
That's the thing, though. The movies acts as a great illustration to the book, but without having read the book it's very confusing. I remember it came on telly a day or two after I finished the book, and suddenly everything slotted into place. And you could see which bits had been shuffled around just to shift the narrative along quickly.
The SciFi Channel did a mini-series some time ago, but the cardboard they used for the sets was too wobbly even for Doctor Who. I seem to recall the acting was stiffer and more wooden than the sets.