I was worried because I was a beginner, so I bought it because it was on sale. I know the theory, but I'm weak in practice, so I took the class to fill in that gap. I haven't listened to everything yet, but the instructor explains it clearly and clearly. I'm very satisfied with the overall price! I practiced using the theories I've learned while solving problems, so I think it's definitely faster and better. I'll listen to the end because I trust the instructor who said he'll make it so I can solve problems on my own!!!