I remember we had M&B exam.
Avg in our class on "old" syllabus was about 85%, while on new it was under 50% and highest score was 67% for 2 people. No one in the "whole world", passed that one exam
They gave us a re-sit, but still...
Anyway, if you thinking just "bristoling" everything,
you might get screwed big time. Few mistakes + new questions = fail.
If
you study and using bristol as aid, you will be fine.