I was in the opposite boat from Doc Admin.
I did great on the VER section, fine on BIO, and not as hot on PHY... I think that breakdown is going to be mostly based on what kind of an academic background you have. Mine was arts-&-letters, personally, so I cruised in that area. People who major in Bio tend to do great on that section, no big surprise there. Oddly, some Physics majors I spoke with thought that Physical Science was the toughest section, too, but I think that varies from person to person.
I took the Princeton Review course, and I found it fairly helpful, but not Jump-Up-And-Down-And-Kiss-Your-Instructor helpful. (That being said, one of my instructors was totally hot, and I would have gladly done it anyway...)
The best advice I can give, and what seemed to help me the most, was to get my hands on as many practice/old MCAT exams as possible, and crank them out UNDER TIME CONSTRAINTS. That will get you used to it, you know?
I found the MCAT much more challenging than the GRE (which I took for grad school), and I think that prepping in a timed test environment (with a full bladder) as much as possible makes a huge difference.
OK, ideally not with a full bladder.
Good luck!
CN