I just sent my deposit into CCOM so I'll share some of my thoughts:
Strengths: Great Clinical sites, lots of future residencies in Chicago area, small but nice campus with workout facilities and apartments, Some research opportunities (unusual for a DO school).
Weaknesses: expensive (tuition and living - compared to Texas), limited research (I'm coming from a major research U), cold weather (depends on your tastes).
These are just my opinions and are in no way inclusive of everything offered at CCOM. Also, a lot of my decision was based on "feel". I picked the place where I felt most comfortable and that I could envision myself attending (walking the campus, etc.)
Remember, in the end, if you work hard you'll be a doctor no matter what school you attend. Just pick the place that matches your style and where you'll be happy for 2 years of your life.
Good Luck!