I took the MCAT last August without studying for it. I simply relied on the fact that it had only been 1-2 years since I had the material. I ended up with a v9 ps8 bs8. I didn't realize how much emphasis is really put on the MCAT, but quickly found out so I decided to take it again this August.
I took the Kaplan course (which I didn't think was all that helpful), simply buy the books and the practice tests, and take as many practice tests as you can.
I ended up dropping a point in my verbal to 8 (which I actually thought I got a 6-7 on right after the test) was getting 8-10 on verbal in Kaplan course.
I gained 2 points in physical science (10) simply because I actually studied the materials. Studying the materials and formulas definitely helps. Was getting 9-10 on Kaplan tests.
And I gained 1 point in bio (9). I think that went up because I had taken biochemistry and genetics after the first MCAT. Was getting 9-10 on Kaplan tests.
I knew I wasn't one of those 30pt guys/gals so I am pleased with my improvement, and hopefully my experiences may help those of you who are about to go through the same thing. Just remember the MCAT is just another hoop to jump through on the road to medical school, and take it serious, even if you have a 3.9. This will be my first year applying so we'll see if 27 is good enough with a 3.9.
In the end I would not recommend shelling out the 1200 dollars for Kaplan. Instead shell out 60-70 for their review book at barnes and noble, and order the AAMC tests online (not sure what they cost). So instead of 1200, you pay about 100 and get the same sort of production.
Just my 2cents