Saw the movie too. Didn't particularly enjoy it beyond the visuals, and I've loved the book a few years back when I read it.
It felt all over the place, mood was nice, but a lot of the time I was put off by the music, either it's not there, or it's so fucking loud and overbearing that you can't pay attention to what's happening in the scene itself. As said before, fight scenes were rather shit, they do a nice setup with the training at the start, but afterwards it just looked like regular swordfighting/brawling. Also the whole talking up of Gurney as a tough bastard didn't really mean anything in the end? Dude just charges in and dies without doing sweet fuck all. At least Idaho had his big fight with the Sardaukar to show that he's a genuine threat.
Overall, the whole thing felt like an overly long chore than an adaptation of a book that was fairly enjoyable to read. There's being purposefully slow to build mood and atmosphere and then there's stretching shit and throwing in stuff that isn't important to balloon the movie to a stupid length while not being able to tell the full story.
So a fairly big pass from me, don't see myself looking forward to the sequel, much better to go back and read the books again imo