The course is very good, the explanations and repetition allow you to understand the different facets of using your sonar, traditional, side scan, down scan, all of the things that would otherwise take you months or years of trial and error to learn on your own. He has a solid understanding of how to not only use but teach the concepts. The biggest knock I've seen online is that you could get this information for free on YouTube or Reddit, etc. which is what almost kept me from signing up. Well, I checked, and you can not.. And if you can, it will take you 20X as long to do it that way. The three courses in total took me somewhere around 3 hours. So if you want to spend 60 hours to save 100 bucks, do the math and understand the value here may not be proprietary information but simply a solid, succinct and well delivered resource to teach you what you need to know in a fraction of the time it would otherwise take you. Good job on the delivery Hugh.