I admit I'm a bit optimistic in assuming that anyone where has watched it.
I enjoyed the first part (admittedly as a captive audience on a plane), but I did notice how they made the Fremen, who speak Arabic, half-black and half-Arab. Apparently, the Fremen are yuge racists who don't interbreed with the blacks among them, or if they had, all of them would be a mix of the two. But there was a clear dividing line between them, as if there's been segregation for centuries.
The first book has different voice actors for different characters, but for many of the books after that it's just Simon Vance and like 1 other and he doesn't put on much of a voice between characters I think.