I think you can get by without a review course if you organize your knowledge, outline answers to the basic questions you know you'll be asked (hypoxia, ABGs, hypotension, ACLS, etc.), and practice out loud as much as you can.
I didn't take any review courses but, then again, I have never been a review course kind of guy. I read the Ho text, snippets of Yao and Artusio, Board Stiff Too, and the Loushin prep for written and orals. I liked how his oral answers were structured. Not heavy on the scientific detail, but good, common-sense answers. There are many ways to answer a question and few are absolutely wrong unless you say something ridiculous. "What do you mean, I cannot intubate this neonate? I have SKILLZ! If I can't get a tube in, I'd just leave 'em on the table!" If you can adapt, come up with a reasonable plan, and defend your approach, you will pass.
Best of luck to this next crop of ABA diplomates!
Regards,
PMMD