I have never had my or any other Nautique malfunction with ZO, but when driving the MC and Malibu in tricks you need to be careful. While hand driving the tricker around islands or sharp turns, if you don' t smoothly and progressively advance the throttle the boat will over shoot the set speed.
Be careful about not advancing the throttle in tricks, here in FL we have tickers that can really pull the boat down. Steven Seal is a prime example,super strong and his hand pass is all flips.
I can't believe we are even having this conversation, ZO has been around since 2007.