Ordered this pack after my iPad picked up a scratch, despite being cosseted beyond measurable belief.
Of the 6 that arrived, 2 were effectively unusable - a long bubble down the middle of the protectors turned out to be defined by two long (but thin) scars in the plastic.
Of the others... The first fitted onto the scratched screen beautifully.
However, apple then replaced my iPad because of the scratch (!), and fitting a protector on the replacement turned out to be an utter nightmare. I discarded 2 after foul-ups on my part. Started off wonky, bubbles, not good enough. A third attempt went on perfectly; but it was then that i discovered the twin scars. A fourth went on superbly; but 3 days later an edge had lifted, creating a 2 inch bubble along the edge that couldn't be squeezed out.
So a week or so later, I've now got the final protector fitted, compete with dual scars, and have put in an order for a second batch of 6.
Obviously theres a compromise between user error and manufacturing error going on here, but it's definitely a good thing that there are 6 to a pack.....