Review and Challenge Exam Fail

Has anyone ever done the exam review before? I know its about $300 to do, but can someone let me know if the fee is worth it and/or is it helpful? 

Thanks Everyone - I have 5-6 failes on PPD, PDD and PA. I want to know what im doing wrong and not just feel as if I am helping to pay for this new exam transition. 

(Also, I live in PA