I can highly reccommend Nathans courses to anyone. Counldnt pass flight planning to save my life. Second day on course with him and he found what I was doing wrong and then made me faster.
Not trying to brag, but due to him, I finished the exam with 40 mins spare after doing most of the harder questions twice. Although not a perfect score, 92% was enough to pass.
Do not hesitate in using this course.