I took their "How to Publish Your Completed Novel" course a year or so ago. The how to write a query letter and short synopsis part, as well as the general education for how publishing and agents and editors work, was very much worth the price. Was not as thrilled by the feedback on my actual novel from the author who was teaching the course -- her whole experience was with thrillers and the book that I was taking through that course was epic fantasy. To say that she had no grasp of what either the words epic or fantasy meant is an understatement. However, the "selling" portion was great and the teacher was certainly dedicated, albeit unable to understand why I could not take an epic fantasy and "speed up the storyline to start and end over a weekend or three days".
I also found it very easy to do online, and met a couple of friends through class. We still encourage each other through the "fun" process of submissions and rejections (not to mention finishing and editing and re-editing), so that was worth it, too.
For sure they use published authors, all of whom are successful, so you would learn from those who have gone before. I was happy with the investment of money and time, and would do it again if I felt interested in one of their sessions.
The side benefit of taking this course was to see firsthand how many people are, frankly, delusional about their books being ready. It was a great ego booster, and it also gave me great empathy for all agents, editors and publishers out there, because I saw over a few weeks what it is they really see on a daily basis. And it ain't pretty.