I haven't seen the movie, though I did read the book. I only got half way through it, that thing needed to be edited down by 50%, though otherwise it was enjoyable in a bad sci-fi way. LRH either needed to make a 3 book series out of it (still with lots of editing) or just cut out the second half of the book and still edit lots.
I think there have only been 3-4 book that I have never gotten all the way through, and this is one of them.