What exactly is the course content like? From previous online courses I've taken from Coursera/Pluralsight/other platforms video lectures seem to be the the norm which I actually really hate, I rarely attended lectures and instead would just read the material, turn the HW in, and come in for quizzes/exams. Watching and listending is just not the way I learn, something about reading it makes it sink it better. And do they still require you to buy additional textbooks or is all the necessary content included in the course modules?
How engaged/competent are the instructors assigned to the courses? If I have questions is it easy to get a hold of them, and do they actually know the material enough to be able to adequately explain things and guide students to better understand the material?