The content is high school maths B... You should only be taking this if maths B is required for a course and you didn't do it in high school.
It is so ridiculously easy, but that doesn't mean the course isn't good. The lecturer, Michael Jennings, has a knack of explaining concepts in easy to understand ways. However, he sometimes goes overboard and over-explains concepts. This is likely due to the type of course it is, and the implied type of students taking the course.
Based on the criteria on this website, the course does well overall. If I had to rate its difficulty, I'd put about a 10/100.