To be honest their is nothing wrong with Higgins course, but learning everything in Flight Planning in less than two weeks is a huge effort on both sides.
His course is tailored to people who are working and that would like to get through quickly and efficiently. I enjoyed the course last year in MCY but by the end of the 2nd week I was so burnt out I barely had the energy left going into the exam.
I honestly think people would have a better success rate if they gave themself an extra week or two to revise everything in the course before attempting the exam. When I sat flight planning last year out of 47 students there were 16 that passed.