I've been playing KZ exclusively (like all new champs when they come out). I'm pretty epic with him. I've actually only played against 1 good one, the rest have been pretty terrible.
But he plays similar to Talon, except when you ult you don't run away. You just position yourself to Q the guy 2-3 more times till they die.
I always leap over tanks and kill the squishy in the back (usually adc or support). Then, depending on how much damage I've taken, I'll continue to eat'em alive or leap away (I always evolve my leap first for the CD plus range.)