I study a pure form af Kido, I will say that any school that teaces HKD and spars is not the real deal. You see most pure forms teach you to break or kill! I wonder who would volunteer to go first in the sparring ring! If you have done TKD than doing HKD will be the go for you! HKD teaches effective knee and elbow strikes, as well as grappling, chokes, pressure point strikes etc. So HKD gets my vote!!