While some of it is very unrealistic in the way it's presented, and a bit deluded honestly, there are some good principles in there in a few of the vids. Using your hips to take angles, being centered, turning your opponent, armdragging, sweeping, throwing. These same things apply to Boxing, Judo and BJJ. I like something like Tai Chi for instance if done correctly. Gives a good low center of gravity and should enable you to use your hips properly. It's basicly building a strong foundation that you can apply to all martial arts. A lot of the same things goes through different martial arts, but it shouldn't be that surprising since they all pretty much have common ancestors. Sure, there is A LOT of bullshit in between.