I'm up to heretics and I'm in the camp that recommends to keep going. Think Children of Dune is my favourite of the books to far.
That’s as far as I got, then I saw released from prison and stopped reading for a while. I thought the sequels were great books but not nearly on the same level as the original. The original was just that perfect mix of adventure, politics, and mysticism. The sequels really seemed to dump the adventure and for kind of confusing.