I've heard of him a lot. Looked into his school, etc. I just don't like a lot of his ideas. He doesn't really condone riding the horse, says bits are evil, saddles are evil, etc. I don't like a lot of the things he does to show trust (IE Sitting on a horses stomache while they are on their back with hooves in the air) because a lot of people, I find, who are really interested in natural things are beginners with good intentions but a huge ability to get hurt.
Throughout reading and trying to learn about him and other bridleless riders, I saw that he seemed to deem "normal" riders as ignorant and abusive. He has some videos up about bits or "metal" that are quite frankly a bunch of riders with heavy hands and short tempers. Horse refuses jump, rider yanks on the horses mouth and goes after him with a crop, bits are suddenly bad.
Some things I pulled from his website I don't agree with: 39] What are the duties of a School member?
Stop riding for at least a year to let the back of your horse recover and to work on a new relationship with your horse. Study the horses’ anatomy, soul and nature. Educate people about the horse, and make them attend on the horses that walk in sport.
Greetz Chantal James
Yeah, giving a horse a break is good...but I think this is kind of excessive in the same way I don't like other NH riders who focus only on groundwork
38] What is forbidden for School members?
To participate in any eventing or sport activity. Don’t practice NHE and train another horse for the meanings of sport.
 Can I practice NHE with my own horse and ride the another?
It wouldn’t be fair and true to NHE, would it? If you know how much damage riding causes, how are you still able to ride with a clean conscience? Even if it’s another horse, ask yourself are you fair and a horse worth? Why do you ride? For you or the horse?
 Why are we against sport and pleasure riding, eventing, etc.?
It’s disrespectful and disgusting, almost perverted. Sport dressage, horses that stand all day long in a box and are only taken out when they get ridden. And then they need to walk perfectly and if they make a wrong step they get punished. Forced collection, broken horses with red eyes and dead looks in their eyes. Mouth full of foam and wide open, trying to save the tongue from the silent torture called bit. Used for communication and aid, for the horse only a pain.
For more information please see this link: The difference of Nevzorov Haute Ecole from other schools and ways of horsemanship
You can find more info on his FAQ (Where this is pulled from) from his webpage.
I'm not trying to start a debate or anything so sorry if I come off as rude, I just really don't agree with this guy's ideas, don't think the horses are as happy, collected, or athletic, as he puts on.
I think people that have a lot of good intentions (don't abuse your horse, try and bond, etc) will be misinformed by his ideals and be so worried about being friends, not hurting the horse, etc that they don't gain any horsemanship skills.
He also is a huge supporter of Dr. Strasser (sp) which I don't agree with but that's a drop in the bucket of my reasons. Read the FAQ is all I can say.