Are Zippy Lipos safe with a Castle MMM Speedy?

So what was the final resolution on this? Do cheap lipos cause ESC failures or not? If so could somebody please explain the technical reason for this. I'm just a Mechanical Engineer Dummy, so 'splain it slowly. All I saw in these posts was something about voltage ripple, didn't make sense to me. I don't understand how a DC power source would "amplify" a voltage ripple, cheap or otherwise.

Thanks