I liked the first 2/3 of the first film. It had some fun takes on events and scenes. But after that it felt like it was on auto pilot plowing through plot bits. The events that close that film are really uninteresting / don't feel very climatic.
I get it's a two part film but I do expect a given part to feel somewhat complete, but I felt like it was more of a "to be continued" ending and I was less than entertained by that point.
I do like that there's such a variety of Dune films and content (the sci-fi miniseries including children of dune being my favorites). It's fun to see a different take on things. I really have never felt any of them were "wrong" or fundamentally "bad" just different approaches.
I wish every great sci-fi content could get lots of versions / interpretations.