I can't know your specifics of course but I took the beginners course when I got my america after a long time off. It was only one day and it was good for me because it taught, and gave decent practice, in some basics: Low speed manouvering, swerving (counter-steering), and emergency braking etc.
I probably knew all the stuff (except the low speed part) at some level but the course definitely helped my riding.
I barely passed the test at the end of the day so I would probably not have survived an advanced version. YMMV.
