And then, when the Panzer Glass product breaks down during installation, the Panzer Glass company assumes nothing. But NOTHING. So if you're going to buy poor quality, you might as well pay less.

Usually, Panzer glasses are really very good, especially their fittings with the iPhone, but for iPad I would say, it's not really edge to edge and it misses by a mm on either sides, so if something cheap as you mentioned cheaper by 70% is available then go for it. In any case, after 2-3 months, it doesn't matter much, it matters only when your product is new you care for such things.