Here is my little story. Attempted the exams first time in July .... almost zero prep time due to busy work doing CFI work in the US. I studied primarily for clearing air regs (I used Bali and read the DGCA website for updated rules and regs). Got through air regs (78%). For nav I was not planning to even attempt it but decided to go for it 4 days before the exam. Studied some notes from my friends who attended classes and very little of GSP's. Got 65% which is not bad considering I put in just 4 days of work. Disappointed but now I have a good idea of what to expect in this atttempt in Npv. The moral is guys , these exams should be easy to clear if you study the fundamentals and put in effort. Sure they are no FAA cakewalk exams but they are not impossible.