I tried watching the level one dvds, and I could hardly get past the introduction. I liked the seven games (that's all I really know about his methods), but something about him just rubbed me the wrong way. I wasn't crazy about the way he worked with the horse, and I couldn't get through all the fluff with his wife and that other lady.
My friend is an experenced horsewomen with a lot of success under her belt. And now she's saying things like "don't do that, you don't want the mto think you're a predator", ok maybe I could see that being relevant to the two year old we are working with, but not my five year old mare. Trust me, she knows I'm not going to eat her.
So my opinion on Parelli is pretty indifferent, if not slightly annoyed by it.
Now when I watched Buck Brannaman's documentary, that was something else. So I'm not anti-NH, but I'm not going to follow one trainer religiously.