I trust my JM 1000% but I never relied on them to pull for me.Yes,the JM is there to teach you and ultimately to save your life,IF possible. Nobody during my instruction told me that I should rely on my JM "if I get into trouble" and I never asked myself that question. In the last levels of my AFF I was required to do a tracking for 3-8 sec. at the end of the freefall program - that would create(or not)