I have a question for those that have taken the exam (with or without taking a prep course). I'm at a point where I'm able to take my Masters exam, and looking into prep courses around here (maryland) are anywhere from $450-$600. I'm pretty good at taking tests, but I don't want to waste my money either way (whether having to take the test again, or by not needing the course). What would you all advise? Is there certain things I can study (mechanical code etc.) and should I fork out the money for the course or would self prep be sufficient? Thanks in advance.