The metal blindfold is substantially identical to the Osterlind metal blindfold (I take no stand, however, on who invented the concept). A few of the effects were shown, but the full effect of the trick was not.
The blindfold has no secret holes or mirrors. It is exactly what it appears to be. It cannot be seen through. It does have holes near the upper corners, but those are there to receive an elastic strap to hold the apparatus on the head, and they cannot be seen through. Some smart-alecks out there might say, "Ah, but you can peek underneath the blindfold along your nose," but a performer may actually ask one or more spectators to try on the blindfold and see for themselves whether peeking is possible. They find that the metal sits snugly along the bridge of the nose and does not permit peeking. Sure, the performer can peek if he nudges the blindfold up a bit, but at no time during the performance does the performer ever touch the blindfold with either hand, even to scratch an itch or make an "innocent" adjustment, and the spectator may at any time demand to see whether the blindfold is still snugly in place.
Yet, as Banachek showed, the performer somehow DOES see. There are no stooges, no special effects, no secret optics on the apparatus, no electronics. What seems to be impossible is shown to be quite possible, and it is hard to avoid the conclusion that supernatural capabilities are at work.
This trick--and it IS a trick--could easily be more convincing of supernatural capability than any of the other "psychic" feats on the show.
As for the test subjects who tried to find photos or match things to people, I would have preferred that the show include statements from all of the people--which I expect JREF requested--that the tests were fair and that the test subjects OUGHT to be able to demonstrate a high success rate in these tests. One of the test subjects did offer some statements to that effect, but all of them, after the test was over, complained that their tests were not fair. It is the same story that Randi has told thousands of times: people have sincere confidence in their abilities and will agree that the test is fair and may even express an EXPECTATION that they will win the prize; but after the test, they sing a completely different tune, complain that the test was unfair, and make excuses left and right.