Sorry if I offend you but I cannot comprehend how anybody could possibly give this book a 1 out of 5. I myself found the book to be incredibly addicting and found myself constantly reader more than I should have because I needed to find out what happened!
Although to clear my mind I need to point out a few key details:
1) I noticed some people talking about a descrepancy in the Pauls' DOB. However if your ead closer, you can realize that their are actually two Pauls. One from the Prequel Dune's (this is Leto's Father) and one from the Original Dune (Leto's Son).
2) Many people critisized Brian Herbert as not being equal with Frank Herbert... Although I agree with you in the sense that he is not the same as Frank, stating that Brian Herberts style of writing is "inferior" to Frank Herbert's is completely biased.

Thank you for yout time. I highly recommend this book.