I don't agree with a lot of their methods, though. I saw an article about using an electric massager to get your horse used to the clippers. I have an idea. Why don't you use the clippers to get your horse used to the clippers?
And their saddles. Conventional saddles cause swayback and downhill build? That's the biggest load of garbage I've ever heard. Naturally poor conformation causes those flaws. Tons of horses who have been ridden in conventional saddles for twenty years are still in great condition. And like everybody has $4,000 to spend on a Parelli saddle.
They also say that tight legs and having your weight in your heels makes the horse tense and somehow debilitates them. That's why Linda always has her stirrups so long she practically has to point her toes.
Have you ever seen any Olympic or Grand Prix riders who ride like that? And look at their horses. They're sooo messed up aren't they? Judgement is 17 years old and still in peak condition, and still jumping at Grand Prix level (in a normal saddle!). Beezie has her heels down and legs tight, and he can still jump and move normally. He doesn't look tense or restrained at all. But get those heels up 'cause Linda Parelli says so! Jeez.
So yeah, they have their good and bad points.