I got the 14-Day Course Yesterday, and I am trying to complete it within 5 Days. I completed Days 3 and 4 today. I found day 4 to be exhausting, as there were quite a few questions that I had to write about, and I fully explained all the correct and incorrect answers to each question.
However, I feel that it has improved and refined my approach to passage questions, and I can now eliminate incorrect answers more easily.