Hunter College has a TON of post-bacc students, rangeing from philosophy to business majors to whatever majors. I haven't met any engineers yet, but I'm sure there are a few. The ages range from 23 to 35 or so, with an average around 26-27.
Biology and Organic Chemistry are standard classes and are the SAME at every school. Its up to you if you want to spend $4000 (at Hunter or City College) or $40000 (at Columbia or NYU). An easy decision if you ask me.
Columbia is super-nice and super-smart. However, I have met a number of Ivy-league graduates in the post-bacc program at Hunter. Most people carry the same opinion of why they chose Hunter (the price and its focus on health studies). Most people are simply preparing themselves for the MCAT.
In my opinion, its a standard public state university (just in a super-urban setting).
Everyone's heard of Hunter out east. The faculty is excellent, and the classes are very competitive and challenging. The Bio class is around 700 students and taught by a very cool lady. Her test mimic MCAT questions. My Orgo class is taught by an adjunct MD/PHD neurosurgeon (bad-ass).
You acceptance to med school will depend on your undergraduate GPA, research experience, etc., and most importantly -> your MCAT score.
An A+ at Columbia may carry slightly more weight than an A+ at Hunter, but I don't think its worth $40,000. I would put more emphasis on your MCAT score.
I would have rather done my post-bacc at my alma mater Univ. of Wisconsin, but I was sort of stuck in NYC (involved in a relationship). There is a TON of red-tape at Hunter and it is very crowded, but its worth the effort, if you want to stay in NYC. You've got to fight for everything -> getting into classes, getting your federal aid approved, etc. In the end, you'll prevail and you'll be happy.
Here is a few tips if you want to go to Hunter:
1) Stay at your job until school starts, save up as much cash as possible, NYC ain't cheap
2) If you want federal aid, apply as a transfer student
3) Start studying for the MCAT now!