I've never read the books. Watched Dune 1 (7.5/10) the day before Dune 2 (8.5/10) which I think helped the overall experience a lot since it was all fresh. Pretty much agree with all your points: visual marvels, amazing sound/music, engaging story, but felt like I was missing a lot of context for the world overall. Didn't understand why some things were happening (maybe that's just me being an idiot tho). Overall super fun theater experience