I enjoyed the movie last Friday, and I'll see it again with friends this upcoming Friday.
I liked it! I re-read the book up until the ending of the movie last night, just to solidify my understanding of the differences
I'm glad the movie exists, and my ultimate take is that if you want the best Dune experience, read the book. The size, scope, and epic nature of the book can make for a spectacle of a movie, and that's not bad. We study the original Greek plays by mainly reading them in English, which is quite different from seeing them acted live in Greek. The basic truths of humanity contained in those plays make them enjoyable to be read in English, but it's not the same experience as the "native-original format", which I don't think is a negative, but simply something unavoidable.