Me and 4 employees of mine just went and took the Allan Block Certification Class yesterday. And I've never really been one that was that big on certifications. So understand I was going into this very skeptical. Actually, the only reason I went was because they told me that once we were certified, they'd start sending us a lot more leads (they get a lot of calls and emails from their website and from local home and garden shows). But after having attended, I must say the class was very informative. I am glad we went. We definitely learned a lot about building walls in general that we didn't know before. I would encourage anyone who is interested in building Allan Block walls to attend this class. They are fairly short (~5 hours) and there is a simple test at the end. And then you are certified. But more importantly, I guarantee you will come out of that class building much more well-built walls than you ever have in the past.