Toxin-
I would say on a one to ten scale, competitiveness for getting into the program is about six. The program by no means accepts anyone who can write the tuition checks--there are prerequisites; however, it is a post-bacc program designed to help people improve their credentials.
Objective measure-wise, they look roughly for students with MCATs >=27 and say a 3.0-3.3 GPA; appropriate EC's & community service/other health experiences are required as well. While I was there class size was approx. 100: 80 direct admits + 20 students continuing on for a second year after the MSP program. Also it is rolling admissions starting around March.
FWIW, I was happy with my experiences in both the IMS & MMS programs.
HTH,