I just took it. Made a 372. I've taken many phase 2 COMSAEs, and this one is the hardest. It was harder than the last time I took the actual exam. What was interesting was I did better on subjects that I normally do horribly in and vice verse (FM, peds and H&P in the former, IM psych and prevention in the latter). I saw terms on their I've never seen in any review books. I'm concerned that my review books are inadequate (Step Up to Step2, the 2nd newest edition, USMLE step 2 secrets, underground vignettes). I also use the Paul Bolin lectures as well as some Kaplan OBGYN lectures I've found. I used DIT, it was good for knowing what's high-yield and such but he just reads from Step Up.
I'm baffled right now. I failed step 2 by 2 points, the time before that by 40. My best COMSAE score was a 402 in July 2013.