First off, Ninja Complete is not a complete study course. It is still meant to supplement a study course. So, not to burst your bubble, but you may want something additional! The cheapest route would be to add the Wiley books – approx $25-40 each depending on where you buy them.
However, I have known some people who passed just with the Wiley test bank, so it's not that it's impossible to pass just with the Ninja package…just that it's not intended to be a full review course. Eventually Jeff plans to develop it into a full course, but it isn't to that point yet (at least last I heard).
I haven't used most of the package, so beyond my advice above, I'm mostly just bumping this thread for you. The audio is nice to be able to “study” while doing something else – aka driving to and from work, vacuuming, weeding gardens, etc. Jeff has made it relatively short in order to facilitate listening to it multiple times. A lot of people swear by the notes, re-writing them (and adding their own notes to them) many times before the exam, but I haven't used them much. The free trial was probably to Ninja Blitz, which is the video/lecture series which Jeff is developing. I think he said the FAR videos are complete, but I haven't heard of any other courses being complete, so again, view these as supplementary, but not as covering everything you need to know! Last I'd heard, there were flashcards as part of the package, too…and those I know very little about, as I never spent much time playing with them.
The one piece of the package I can speak solidly about, though, is Wiley Test Bank. I <3 Wiley. haha. My study strategy has been to read Wiley's books and then do everything in the test bank, and I feel like the test bank's questions were really good at assessing my knowledge. So, since I've used WTB extensively on all of my tests, I can definitely say that part of the package is very worth it! 🙂
.