After I was in the same spot last year as many of you are now, I wanted to share my opinion and give credit to Marc LeFebvre. I barely do this, however, in this case I really appreciated the experience and would like to support him.
As Austrian resident it was not feasible to go to one of the bootcamps offered last year and I was struggling with some exam approaches, especially for the morning/constructed response session. Marc offered me his help, though, and provided me with a different way of thinking. He knows the past exams inside out and apparently even the blue box examples, just to give an idea how committed he is.
Passing Level III still depends on how well you are prepared and there are no shortcuts. Preparing with Marc probably means more intense work but you will be better prepared with more efficient use of your time and he really cares about people passing. Back then, when I considered joining one of the bootcamps I did some research here and I found an interesting quote. Somebody mentioned, right after she received the exam results, she felt the urge to let Marc know she passed.
There are now also videos available on the LevelUp website, including some for free to give you an idea of his approach. Have a look, you will probably find it useful.
Have a good preparation and good luck for the exam.