Vunak is ok. Some of his guys can fight quite well.
He teaches a "strategy" for dealing with fights, and, it's a damned good one. Its simple, efficient and to the point - just like a real fight strategy should be.
The only problem I've had with PFS is the way it's often trained.
Train it real and it's for real. Pretend to train it and it's just another fantasy based martial arts system.