First thing is that I actually tried out 2 other courses before finding this one (one cheaper and one quite a bit more expensive). This was, in my opinion, abundantly better for a number of reasons. So, the expensive course I did had limited video (just YouTube and no classes of English teaching to watch) and small sections of A.I. audio that accompanied the text (assuming they didn't just squash them all into the final 3/4 of the course, but why would they do that?). This was better than the cheaper course, which had no audio at all and was just pages and pages of black text on a white screen with no images. That was my first experience of online TEFL, by the way, which was an eye opener, for real. To be fair to those companies, they did give me refunds quickly.
Now, the expensive course did have a bit of a smoother interface with shorter lesson sections than study TEFL's, but it seemed to cover far less and had barely anything on what you actually need to do to teach stuff. It was focused on content of classes rather than how to go about breaking it down. I thought this course was so good at covering the practical aspects, though it was still theory, of course. Don't go into this expecting a perfect course, but compared to the two that I tried, it's a bargain because it has more features than let's say 'some' more expensive others, because I don't know if I just got unlucky with that one, and it is much more than just a block of text with quiz questions.
My advice is watch the classroom videos and do the problem solving question tasks properly, and you'll get a lot out of this course. It's worth the hard work.