i partook of an all-day seminar on this about 3 years ago. the very stressy dog for whom i took the thing HATED every single thing they showed us.
when i got home and tried it on other dogs, one LOVED the ''little circles' being made oin her head. another one could care less unless it's a standard belly rub being offered. the 'wrapping' thingy they did left me thinking ''huh?''
my advice would be to read whatever literature you can find on it, and try a few things on your dog, before spending the bucks for the seminar. [ i think it was $125 --can't remember now.] NOT worth it for me .