Shi....
Dan Insanto was in my area bout 15 years ago doing an entire weekend series of clinics. I attended one on empty hand defense against a knife.
Literally every 3 minutes he changed techniques. Kinfe blades were flying from his hands left and right (one almost missing his new baby, and roused his wife a bit). There was no time to take notes. Fortunately I had his older book and generally understood what he was presenting, but if you had no background you could get lost real fast.
There was a group of his up from Princeton, and the classes were really an encyclopedic review for his students. Others got a chance to experience but IMVHO, not learn.
Learning requires a different approach.
A seminar with Insanto is definately an experience you should take, but to do more than just be exposed to his technique, you really have to work.
Good Luck,
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victor smith
bushi no te isshinryu
offering free instruction for 30 years