I took this course and got a certificate in one go. The course content itself is excellent. It is structured in a short time, so it is convenient to focus, and you can study while listening lightly. However, if there is something a little disappointing, it seems that there is a lot of overlapping content in the problem-solving section. How about reducing some of the overlapping and adding new types of problems? I think there were some difficult problems when I took the test this time. Of course, if you studied the basics, you can solve them. Now, I plan to purchase the next level of certification course and get it.