The Bird Tricks people are first and foremost sales people. That alone puts me off. Second, they take information from the real experts, change the words and call it "new". It is not new, or any different. They have, in the past, recommended flooding techniques which can cause aggression or learned helplessness. They have also stolen videos from experts and used it on their website as their own. This being years ago.... they also had fake testimonies from clients - the only difference would be the bird's species, or maybe the bird's name.... otherwise, it read the same.
I don't doubt that they love parrots and I don't doubt that they love helping people, but everything about them annoys and bothers me. I have heard that they have starved birds in order to train them in the past. Not something I agree with.
I would recommend Barbara Heidenreich, Lara Joseph, Susan Friedman, Melinda Johnson, Karen Pryor, Sid Price, Steve Martin, Kelly Ballance, Jim McKendry, Pamela Clark, Hillary Hankey or even Chris Shank over Bird Tricks *any* day.