Really just don't go there. I think if you talk to some of the others on this board that have experience with the Columbia system, you'll get the same response. Even my friends that are still there are ready to hang it all up and quit. Its pretty miserable unless you have a ton of money, went to an elite bording school and have a fantastic knowlege base already (don't even consider without ap physics, chem, bio under your belt), or if your just sadomasochistic. Medschools are, in the end, number ******. They'd rather see a 3.8 from your state school than at 3.2 from Columbia. That's just how it is (plus, it's not like you get a degree from columbia, because you only take 8 classes, so you don't benefit from the name recognition as much as you might think). Look at it this way:
You can either:
(A)Go to your state school, study hard for the mcat and you can be the top applicant in your class.
or
(B) Go to Columbia, study hard, pay out the a**, and there will still be a dozen kids ahead of you who already have masters degrees and ivy league diplomas from undergrad hanging on their walls. And then, when you do apply, the committee will look you all over and give you a "fair" ranking.
Who's a medschool going to accept: the state school kid that their pre-health committee is gushing over or the "fair" Columbia post bacc?
Of course, if you are well-off, have a couple of masters degrees, and can compete for that elusive A in the Columbia arena, doing well there will get you in somewhere.