For any of those folks who have been through it, are M3 and M4 years like regular school? I realize that you do rotations and stuff, but I would like to think that after my undergrad I will only have 2 years of classroom type learning situations left. I mean who wants to spend 8 years in and out of lecture halls. Also, How do you get graded on roations. Do you have tests in these years? I guess in general I would just like somebody to explain what exactly they consist of.