My DS attended MMI this past year as a Coast Guard self-prep and received an appointment to USCGA in March. These are his opinions/thoughts on MMI and its service academy program:
1. Cadets in MMI service academy program are very independent. When there is not a mandatory corps of cadets function, cadets have the freedom to choose how they want to plan their day. There is no higher authority dictating that you must study at this time or workout at this time. Officially there is an evening study period from 7-9 PM, but few abide by it (at least in the barracks). If you actually want to study/do homework, there are the chemistry lab rooms (which are left open until 9:30 PM) and the student academic success center (where there are peer tutors that are appointed by the instructors/professors themselves).
2. There is almost nothing to do in the town of Marion and the surrounding local area (except fishing or going to a park). So that is why most local cadets go home on the weekends or for those who aren't local but have a car on campus go to Tuscaloosa, Birmingham, or even gulf coast Florida for something to do. There is leave on Wednesday night and from Friday afternoon to Sunday evening. Often times the campus looks like a ghost town on the weekends because almost everyone is gone.
3. As previously stated in an above post, MMI service academy program cadets only have PT 3 times per week in the fall semester and 2 times per week in the spring semester. In the fall, PT is from 5:45-7 AM and is quite challenging if you put effort in. Since there are around 130 cadets in the service academy program, PT is broken up into 4 groups based off of running ability. My DS was in the top group for PT (A group) and the guys in the top group were super macho and in awesome shape. He was towards the lower end of A group and often times struggled to keep up on the runs, push ups, sit ups, etc. because of the caliber of the other cadets in his group, but it pushed him to become to vastly improve his physical fitness. In the spring, the PT is in the afternoon 3 PM - 4:30 PM and is a rotation between swim PT, long runs, and gym PT. In addition to the mandatory group PT, cadets must also go to the gym for a total of 3 hours a week for resistance training in the spring. As a result of this challenging PT program, my DS improved his USCGA PFE by 30 points and did significantly better also on the CFA.
4. There are an ample amount of opportunities to join clubs at MMI. Here are all the clubs that my DS could remember: Skydiving club, Fishing club, scuba diving club, Precision Rifle Drill Team, Service Club, Ranger Challenge (which competes in a military skills competition each mid-October at Fort Knox against other military junior and senior colleges), Special Forces Training club (called Swamp Fox), ethics bowl team, honor and color guards, Normandy Society (history club), Fellowship of Christian Athletes, shooting team (pistol only), and Flying club (which many cadets interested in military aviation are involved in because there are certified flight instructors, a local airport 10 miles away from town, and cadets have the opportunity to earn their Private Pilot's License). In addition to these clubs, there is also opportunity for involvement in music at MMI in the marching band, concert band, jazz band, and choir.
5. MMI is NJCAA D1 sports, so there are recruited athletes but also there are opportunities to walk on to an athletic team. My DS knew cadets that walked on to the Cross Country team and tennis team. There are also Men's Basketball, Men's Baseball, Women's Softball, and Men's and Women's Golf but they are almost all recruited athletes.
6. The academic courses for service academy program cadets are challenging and offer a very authentic simulation of the schedule of a first year cadet/midshipman at an academy. My DS took Calculus I, Physics Mechanics (trig based), Chemistry I, Freshman Composition I, Army ROTC, and Marching Band I in the fall semester. In the spring, he took Calculus II, Physics Electricity and Magnetism (trig based), Chemistry II, Freshman Composition II, Army ROTC, and March Band II. All cadets at MMI have to take Army ROTC (even sponsored cadets) as their military course, except for the small number of cadets who are cross enrolled in AFROTC at University of Alabama. My DS did well academically (mostly because the AP courses he took in high school were good preparation) but, some cadets struggle. So that is why (as previously mentioned) peer tutoring is available and the professors have generous office hours in which cadets can come for help.
7. If applying to a service academy doesn't work out, there other opportunities to become a commissioned officer through MMI. There is Army Early Commissioning Program (which GMC has too), Marine Corps Platoon Leaders Course, and (as previously stated) AFROTC cross enrollment at University of Alabama.
8. MMI is the only civilian prep school used by all 5 service academies to send their sponsored cadets. In addition, the self-prep program is very strong at MMI because if a self-prep does well at MMI, it is an indication that they can do well at the first year of a service academy. Academy admissions officers from all academies also come down to visit both sponsored and self-sponsored frequently. Each year at MMI there are around 70 sponsored cadets and 60 self-sponsored cadets. MMI posts statistics about appointment numbers on their website, but on average 65 sponsored cadets receive appointments and 30 self-sponsored cadets receive appointments.
9. Our DS did Cadet for A Day at USCGA in his senior year of high school and the USCGA Director of Admissions described GMC as more overall Army focused (so think leadership and physical fitness) whereas MMI is more academically focused.
10. As a side note, the sole athletic interaction between GMC and MMI is the annual cross country meet hosted by GMC. This past fall MMI was victorious over GMC!
11. Both schools are great. The choice is up to you.
Hope this helps!