If you look at Step 3 Triage closely and compare it to MTB you'll see that there's a lot good info in both books. I'm reading both books.
I will come back here after my exam and make a proper review on all the review books I used, until then it is not possible to say what works.
However, MTB seems to be good in allowing you to answer what is the best next step (CSS cases), crush seems to be small and missing allot of stuff, but I love the way it is written and I am using it as my primary review book.
Having gone through the USMLE CD content, the best way to prepare for the exam is:
1. Step 1 and 2 material and very good overall background knowledge
2. understanding on how to manage patients - Routine screening tests, common things that must always be done (step 2 CS material), best initial tests, best initial management, Emergency room/Family medicine routine guidelines, etc
3. familiarizing with the CCS software
How to do that in a months/ few hours a day of studying is the tricky question.