Course is ludicrously long, but does educate. Quiz questions include some trivia items, like who regulates what, which don't help you become a better boat operator, but these could be on real exam. On real exam I think I missed a question or two as the next button was not easy to get the mouse on. So give 2 clues to your clients if allowed.... 1) be aware when you write the exam there is a time limit and you can't go back to a question already answered. 2) when you hit next make pause and see if it takes, if you hit it quickly when it doesn't seem to take you might inadvertently skip a question.