Passed! Crazy difficult exam. So happy to be done with it.
For the CA-3's on this forum, take the exam seriously. You need to study really, really hard for it. Don't blow it off because it's a beast.
I think the fundamental problem with the preparation is that there really isn't a single book out there that EVERYONE agrees is essential. If you ask 15 different people who successfully pass the exam, you'll get 15 different answers.
Here's my $0.02:
Hall & Chantigian: Overall a solid resource for studying. I recommend going through it once as a CA-3 in preparation for the ITE. The key is take notes such that you have a condensed outline of this book (gleaned from the explanations to the questions). This will be roughly 50 pages or so of outline. Many people go through Hall multiple times. I think it's a waste of time because you already know the answers after one pass through. Better to create an outline and move on to the next resource.
ACE exams: Also a very good resource for studying. I did approximately 700 ACE exam questions. I recommend that you start ACE exams AFTER you've created the outline from Hall. After each ACE exam, you can go through the answers and add some notes to your outline.
Big Blue: Mixed feelings about this one. The problem with this thing is that it's just too damn big and a bit scatterbrained in presentation (plus the author has an odd fixation on Rangers). Overall, I found it difficult to learn from. I went through it once. Not sure if it helped because I focused so much on ACE exams and Hall for studying. Just to be safe, it's probably worthwhile to get your hands on a cheap copy and go through it once. Undoubtedly you'll pick up a fair amount of info passively.
Faust: I don't recommend this book unless you have photographic memory. It is DENSELY packed with info, to the point that it's essentially unreadable. There are so many details that if you take notes from it, your outline will be almost as long as the book!!
m5: I did roughly 180 of these questions. Overall I have mixed feelings about them. Some people swear by them but I found the Hall and ACE questions to be more helpful in preparing for the exam. I would recommend subscribing and only doing questions in your weak areas (you'll know what they are as you start studying). This will help supplement Hall and ACE questions. Again, whatever info you glean from these questions you should add to your outline.
Baby Miller: Useful resource but not sufficient per se. At my program we had to read it cover to cover in the first month of residency. If you haven't read the whole thing by the time you're a CA-3, I would recommend that you read the whole thing. This is essential to have the framework for studying later (i.e., cramming in all the ridiculous details that the Board loves to test!!).
2 weeks before the exam you should have a relatively thorough outline of material. Go through it every day, ACTIVELY RECITING THE MATERIAL FROM MEMORY. Once you can go through the whole thing, reciting every detail, and do it in roughly 12-15 hours, you're ready for the exam.
At the end, I had probably 100 pages of condensed outline that I went through.
Good luck everyone! It's stressful but very doable if you focus and work hard.