I just graduated from U of I undergrad and some medical school professors taught my undergrad science courses. The M1 year in Champaign is pretty typical. Very book heavy. You're in class quite a bit. For Rockford (2nd year), I've heard that it's pretty small and tailored toward primary care. Peoria, is a little bigger, and will allow you to interact with residents more during the clinical years because there are residency programs in Peoria. I interviewed at Peoria and thought it was OK.