Personally, I think the curriculum is rigourous because it's med school. There are 30 something credit units and that is typical of any med school. Honestly, if I singled out a particular 3, or 4 unit class at COMP, the level of rigorousness would be comparable to what I've experinced in some of the more rigorous classes in college.
I went to a private university ranked in the top 25 by USnews and I did my post-bach at a top IVY and a reputable public university. Based on my experience at the public university, I could imagine someone to find COMP classes to be "extremely rigorous" if that person was used to the level of difficulty at a public university.
I remember during orientation the dean of COMP told us that the school was going to prepare us to be competitive at a national level with all schools DO or MD. I had my doubts. However during my first 3 weeks of med school, I have been consistenly impressed by my peers, by our professors and the quality of education that I've been receiving. Believe me, I know what a quality education is like and I know what good professors are like. So far the 7, or 8 professors that we've had are nothing but EXCELLENT. They are all very intelligent, friendly, and weird but true, all with great sense of humor which made lectures quite enjoyable.
Can any other MSI COMP student give a shout out and agree with me on the professors? I know we might feel different about them once we get our first set of exams back but let's give them what they are worth as of now.
In short, I believe if someone is looking for a solid med school education and have high aspirations for themselves, COMP is the right place to be. If people are wondering how to become a doctor with as little amount of effort as possible, please go to another school. In fact, please don't become a doctor at all.