I haven't went to Doug school but here is why I think Doug is the best. If you have a question Doug always has a answer when you give him a call or text. It doesn't matter if you have been to his school, brought his products, a member of UAMCC, been in the industry a long time, or just starting out. When I call him in the past to ask if BT200 would clean up something he has even direct me to another product. Sometime it is even a product of a company that I have never seen post on PWI. What that tell me is that his advice is to help you do the job right and not self promoting or promoting just those on the boards. I expect the only reason he sell the products that he sells is that it cuts his cost because he uses a lot of those himself.
I had a school mate husband and son that came out and spent two days with us about a month ago to learn about pressure washing and view our equipment set up and how it worked. It took a lot of time to do that and that time was divided between three people and Doug does that himself when he teach his class. At the price he charges for his class I know he make far more washing than in teaching but he does it anyway. He doesn't do it for the glory either. When you see him at roundtables he just a quiet unassuming guy. He not the loud mouth that Ron is (God love him), he doesn't run around giving you his resume like John T, he doesn't tell you about his past accomplishment like AC, he doesn't call you on the carpet like Tony S, but what he does do is offer his help. So being the best is not what you learn at the class but what you take away from it and what is available to you afterwards plus there is no extra charge.