I pretty much did 3 days of cardio and got great results but I did NOT do kenpo or plyo 99% of the time. I ran once a week, took spin once a week and did a circuit leg work out once per week.
I plan to do it again starting January and I think I will give the 2 days of cardio a try. I will most likely run one of them and perhaps I will alternate between plyo and kenpo for the other.