If you're planning to watch Dune, please read this.
I re-read the book just before I went to watch Dune in theaters. Here's some advice on it:
1. Yes, this is something you don't want to miss in theaters. It can be a cinematic experience that goes to the bone. Something that I haven't experienced since LOTR. The enormity of it all, the new world it opens up, the beauty, and the score...
2. Why "can be"? Like with all experiences, you need to be ready for it. Reading the book beforehand is okay but you need to leave it at the door when you enter the cinema. Especially this movie needs that you calm your mind before seeing it. Have a good night sleep beforehand, meditate, drink a beer or do whatever it takes to tame your monkey mind before you enter the showing. Don't compare it to the book during the experience, just sit there, don't think, let it sink in. I caught myself comparing it to the book many times but at the end I was able to forget it and just relax. I can tell that it is authentic, true to the book, and it opened up the world that I imagined when I read Dune the first time 20 some years ago, but please, make yourself open for it, just take it in. Time for analyzing is afterwards.
If you do these things, there's a good chance that you experience something wonderful and precious. I'm going back to see it again and this time follow better my own advice. At its best it is a dream like world where you can spend countless of hours and you wished that you could explore it freely looking behind the corners, walking the corridors, flying the ornithopters... When Villeneuve said that it is a love letter to cinema, it isn't an empty cliché but an apt description. The love of making huge detailed sets, costumes, and using as little cgi as possible, and shooting in real desert locations shows in the performances of the actors and the realness of it all.
Go see it. Prime yourself ready for it and you just might experience something wonderful.