I just finished this course as a verified learner. The content is excellent (5 stars), but for two reasons my overall evaluation of the course is a 4 stars:
This is the first time this course is offered via edX, and there were many technical glitches. But course staff was very responsive, and I assume that these problems will be fixed in future versions of the course.
The course announcement wasn't clear about required knowledge and skills to take the course. Most homework requires proficiency in R.
A positive point was the very active Slack group of students, which helped a lot. (The edX forum, on the other hand, was difficult to use.)
Bottom line is, this course is extremely interesting, one of the best I have ever taken, very ambitious with the topics covered. You will enjoy the course if you have basic proficiency in R.