Grabbed Kuro-obi from Netflix last weekend. Horrible..as in "I want my 90 minutes back and I want to punch someone in the face" bad.
The plot meanders too much and the fight coreography reinforces every BS line ever told in traditional martial arts. Want to get really good? Practice kata under a waterfall (seriously). The ending fight between two "black belts" devolves into the worst grappling match I've ever seen on film or video (and I've seen Ari Bolden on youtube).
Avoid this film at all costs!