@dtatham10- Not trying to scare you, but I took REG this past Saturday and literally walked out in disgust during the sims. I had no clue how to answer any of them and the sad thing is, they were on topics I was pretty familiar with. I couldn't even find the research question, which I found within 2 minutes for AUD & FAR. Ninja's sims are nothing like the one's on the exam so it's pointless to even practice them. You can put 0's in for everything and still get half of them correct. That's actually what I did for my exam because I literally had no clue what to do for them. They set them up in such a way that it's more like they're trying to confuse you than actually see if you know the topic.
I know for a fact I failed and bought the Gleim test bank the other day since it was on sale. They used to sell a package with just the sims, but now you have to buy them with the mcq's. I haven't tried it out yet because I needed a couple days to regroup. From what I've heard from other people on here, the mcq's are crazy long and much more in depth than the actual exam, but the sims are similar to what you'll see on the exam. One thing I noticed just from browsing through the software is that you're only allowed 3 attempts at each sim. Seems kind of odd to me considering more than half of us will be needing to take it again.
I will say that I only tried maybe 30 sims between Ninja and Roger. I knew I needed more time to study, but my NTS was expiring and couldn't push it back any further. Do not neglect the sims for REG! They're not like FAR or AUD where you have a drop down menu and can try and guess the answer.
FAR: 75 Roger & Ninja (notes/flashcards/audio/MCQ)
AUD: 73, 81
BEC: 71, retake 8/29
REG: