well, i do not know about that program, but in my school, for example, we are allowed 3 retakes per semester. You do not have to retake all the fails, - you have 2 or 3 exams per block and if the AVERAGE grade is passing, you are fine (so, you do not have to pass all of them). Also, there is a free tutor available for anyone (i have been working as a tutor for junior med students for several years now, - school pays me directly, students are not billed).
There is not percentile reported in MSPE (dean's letter) unless you are in top 10%. It takes a lot of pressure off, because you know that you can be in the bottom of the class, and, since the school is true pass/fail, no one will ever know.
For clinical years, there is a free one time pass for each block, - if you pass from first retake, noone will ever know.
Basically, school encourages us to actually learn the stuff, pass and move on, instead of just punishing us permanently. It is so nice. Because the truth is, - you might hate A LOT of what you learn. For example, i am applying for pathology, i did not like a lot of clinical stuff, because it is just me, but i knew that it was an important experience, and sucked it up, learned from it and moved on. Yes, i never failed anything, but there were courses i did struggle with, and it was so comforting to know that the world will not fall apart if i fail something.