Personally, guys, I don't have a lot of sympathy for those that have installed these cables.
A dollar or two cheaper per metre, means something is not right.
I would NEVER subject any of my clients to the grief of me looking to make a killing based on me installing sub-standard cable or equipment.
You get what you pay for, purely and simply.
BTW, when did you last megger a new roll of Romex, before you installed it?
I've found dead shorts, lumps in the insulation, some sections of the cable didn't even have insulation on them.
But it's hidden under the outer sheath.