Saw this today. I have commented on Chalamet and how impressed I was with his acting in this and his other parts, let me also give equal voice to Zendaya who conveys a lot with just her face and eyes through the movie and is also playing a much different character then we have seen, as well. As MH said, not a light movie, but I think well done. There are changes I am not sure I am happy with from the book, but I think they are a result of modern times. The very fanaticism of religion shown in this movie, to me, is enhanced from the original book and didnt really make its appearance till the 2nd book on originally, though granted has been over 30+ years since I read the original. The other change I am not sure of I will spoiler:
Finally, the cinematography is fantastic and they way they show scale when dealing with the ships, or even toward the end Paul walking through a crowd is impressive. It started early in the first movie with you watching the people loading a giant ship, this flying to a much larger ship and then finally this mite of a ship being loaded onto the star spanning one. They do something similar in this with one of the spice harvesters, where you see the men in armor walking next to it from a distance and they might as well be ants.