We have been finding him really really helpful. He has a YouTube channel and a podcast with a speech therapist called ADHD Guys and a subscription website with office hours and webinars.
We have been using the methods for a year and we are gradually seeing positive changes. It is somewhat NVR based if you are familiar with that.
There's a discount code for one month at the moment. I get no referral discount!
www.adhddude.com/offers/67zuaLa7/checkout?coupon_code=JULY4