My tryall freewheel has been perfect so far! and if you put a freewheel on the rear it will feel more responsive to a king IMO. Im running a monty freewheel on the back on my limey and it feels more responsive than a king. And there is less stress in the freewheel when its on the rear. dont ask my the why or how cause i dont know lol! but they last a hell of a lot longer on the rear for some reason. But the viz hub doesnt look too reliable in my opinion