I didn't read the book, but I watched the movie a few days ago. Since I'm so generous, I'm going to leave a link to the first part of the movie in YouTube AND a link to the movie's script.
http://en.wikipedia.org/wiki/Watership_Down_(film) (for great justice)
http://www.youtube.com/watch?v=3gYpLGxAetg
http://www.script-o-rama.com/movie_scri ... bbits.html
As for my thoughts on the movie, I really enjoyed it. It's just that kind of story that makes something so simple and small amazingly great and captivating. I mean, what's so awesome about a bunch of rabbits running away from their warren and going on a journey to start a new one? You'll just have to watch it, because I honestly can't explain.
My favorite characters are Fiver and Keehar. Fiver is great for his ability to foresee events, and for always being so worried about everything (almost to the point of being neurotic), and, even though timid and weak, so determined on his decisions he never changes his mind. Keehar is great for being that comic-relief character and for helping the rabbits for no reason.
Highlights of the movie: the very first part, which is the narration of the original folklore (I worship Richard Adams for it) of Watership Down, and the lore of El-ahrairah; the part where Holly tells the other rabbits about the destruction of their native warren (it IS kinda creepy); and, finally, the part where Fiver goes out to look for Hazel, presumed by two other rabbits to be dead.
I highly recommend it. Please go watch it now. :)