I did post-bacc at University of Miami, and to be honest, I was sorry that I did in several ways. I'll give you both sides.
The good stuff: excellent professors, committee letter, financial aid (considered a 5th year senior instead of a non-degree seeking student), easy transfer of information from UM to the schools I applied to, nice staff in post-bacc department, post-baccs were given preference in terms of registering first and paperwork getting done first
The not-so-good stuff: VERY competitive classmates (many of them were trying to get into the UM 7 year program, and when the entire class is graded on a curve, well, that could hurt), $40,000 in debt for one year (tuition plus living expenses---much cheaper at FAU or FIU), long drive for me (from N. Ft. Lauderdale), big classes (I took all basic classes, which always have lots of students, especially at a university as big as UM)
That being said, I had NO pre-req's when I decided to go to med school. I needed all the basics (bio, chem, orgo,and physics) including all labs. I don't think my choice of post-bacc schools helped me get into medical school at all. If anything, the competitive nature of UM hurt a few of my grades. If I had to do it again, I would have saved my money and gone to my alma mater, FAU. You do have to put in a little more effort in a school that does not have an organized post-bacc pre-med program, in terms of getting your letters of recommendation, or a committee letter. Other than that, find a place that has a good location, a good price, small classes, non-competitive students, or as may of those you can find in one place.
Best of luck, and let me know if you have any further questions.