Sandworms is actually pretty good...at least better than what I expected. I don't think that's really how Frank wanted to end the series though as Pinky and the Brain claim.
i'm almost finished with Chapterhouse: Dune
and i have Hunters of Dune
and i know that, even if i hate Hunters i'll want to finish out the series anyway. all the negative things i read about Hunters and Sandworms just makes me very, very afraid.
the only Brian Herbert/KJA Dune book i have read is The Winds of Dune
. it wasn't terrible. it kept my interesting going, but it just seemed unnecessary. some things don't fit in very well. i think in Dune
it states that Paul has never been offworld before and in Winds he goes planet hopping when he's 11.