I took that beast on August 3rd. It was tougher than people made it out to be. I didn't feel that great when I left the test center - actually felt pretty crappy. There was definitely a lot of electrolytes, peds, trauma (every 5th question was 35 yo female taken to the ED after MVA as unrestrained passenger, etc...) and a whole truck load of ob/gyn (every 4th question was 28 yo G2P1 presents to...). I felt completely unprepared for the ob/gyn. Other than that, there was reasonable balance of third year stuff, except they were fairly light on the neuro.
I studied for 3.5 weeks fairly lightly (6 hrs daily at most). Still was able to watch a bunch of TV, see several new movies and get outside on nice days. The first week I started doing kaplan Qbank and realized that I was not going to get through it AND UW, so I switched to UW. I didn't get through a lot of UW and in retrospect, I should've just stuck with UW from the beginning. I read secrets and maybe a total of 15 pages in FA. Read about 100 pages of B and W as well. I just couldn't concentrate (just finished 3rd year and 2 4th year sub-Is). I definitely recommend taking it as close to the end of third year as possible if you care about doing well.
Stats:
Qbank - 70.2 % (finished 42% of ?s)
UW - 67.8% (finished 68% of ?s, no repeats, timed blocks of 46)
NBME free exam - 45/43/41 (93.5% = ~256), taken about 2 weeks before exam (bad idea - lost what little motivation I had)
NBME form 1 - 680 (~254), taken 4 days before exam (again bad idea, but I freaked b/c I had a string of horrible scores on UW)
3rd year shelf exams (in order, raw score only) - Psych 86, Ob/gyn 76, IM 83, FM 79, Peds 85, Surgery 81
Step I - 254/99
I'll post my results when I get them. Thanks to everyone on this board, which I was completely obsessed with.