I just watched this with my wife, who never read the book.
She found the movie great but not 100% understandable. Things are explained in a single sentence and that's it, so that was hard to follow. might need a second viewing.
For me who loved the first movie because it was weird and I was maybe 5-6 y.o., then played the shit out of Dune and Dune 2, I found it to my taste, except Jessica who appears as a frail woman, when I always imagined her keeping her composure despite all. Paul is ok, I imagined him a bit more bulky, anyway.
To me, the 2 hours went like a breeze. Overall good movie, good dune stuff, but the movie didn't move me or anything. 7/10