I bought it because of the good reviews, but the sound gets louder and quieter in each lecture, and above all, the explanations are so bad... It seems like they're going to explain a certain function, but then they suddenly say, "There's this," and end it without explaining... (If you create a child blueprint, this is now... a child. End of explanation... There's no context related to the previous part... ???????????????????) It's a little disappointing that they say it runs for 5 seconds instead of repeating it once every 5 seconds, but I usually don't write course reviews, but I'm really pissed off after taking this class, so I'm writing one.