USSD is a chain that teaches shaolin kempo, but has bad hiring practices and many schools end up with *ahem* sub-par teachers. However, they teach shaolin kempo which in itself is a fine art, and many offshoots of USSD teach shaolin kempo very effectively..my instructor originally learned it before getting fed up with the business aspects and ranking system after around 3rd degree black belt (the chain itself has mcdojo ideas..if you dont teach and dont own a successful chain, its impossible to continue grading) and started his own system. I can assure anyone that he is not a product of a mcdojo, as he created and still consistently beats me in sparring matches, and I still have much to learn, and everywhere I have cross-trained those instructors are impressed with my ability and technique. So basically, he's proof USSD is serviceable as well.By all accounts, the ATA taekwondo system is itself servicable. From what I have read on their websites and from feedback from ATA members, the organization is definitely very focused on the financial success of its schools and tends to be rather pricey. So in their case, I would say that it actually does matter how good he/she is.
I've never heard of United Studios of Self Defense, so I make no comment.
As for business practices, basically same thing as ATA..organization is focused on financial success, but with the right teacher is still a good system.
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