The course format is not particularly student friendly. Relying solely on videos in which the lecturer presents field experience over a slide deck that is not always synced with what they are saying is not exactly the peak online learning methodology.
Adding some readings, linking additional resources that the students could explore (the JHU website has multiple amazing online tools), breaking the very lengthy course videos into smaller pieces would make for a more impactful educational experience.
On top of that, the peer review system is not exactly fool proof, and even after you have successfully submitted your assignment, one can wait for multiple weeks before obtaining the certificate, as there is apparently not enough peers to review the submissions. The discussion forum for the course is filled with people asking for reviews.
That being said, the course content is interesting and I believe that the whole Foundations of Global Health is potentially quite useful for people looking to cement their GH experience and knowledge.
For people who are only getting started in the Public and Global Health, I'd suggest taking the course "Essentials of Global Health" from Yale University which is for free, a lot more interactive & student-friendly and introduces students to multiple online tools that are useful for further research and better understanding.