After 14 months struggle, I finally passed the exam today with 90%.
I have to say thank you to MZ , Ivan, Frits and all other ranchers who answered my questions in the forum.
MZ and Ivan's notes are must read materials. I recommend candidates to read the reference materials referred in MZ and Ivan's notes.
Frits's Enthuware mock exam are really helpful. Despite all the mistakes in EPractice Labs, I still recommend it.
All those materials will guarantee you to pass the exam.
It is a challenging exam to be honest. I got 12 questions on best practices and 7 questions on message level security. I don't really understand what I was asked in some questions, I just simply eliminated those choices that were not possible.