When I saw the demos of this I had a good idea of the secret, and I was correct. If you know the secret to the classic 'scotch and soda' coin illusion you now do with this as well. That's exactly what it is. That being said, it's the very reason I purchased Johnny Wong's Super Chip & Coin. It's a very easy means of accomplishing the illusion of a coin vanishing or changing, plus this version has a couple of enhancements in its favor. The first is there's a magnetic action installed in the prop and gimmick that securely and accurately snaps and locks the piece in place, with no accuracy nor effort necessary on your part. The 2nd is, since the chip is larger in diameter to a normal Kennedy half, the gimmick is equal in diameter to a normal Kennedy half (even has some of the ridged edge apparent on top). This is a great thing because you can openly display it alongside normal coins and it won't catch the audiences eye. It's thinner than a normal coin but that's easily managed.
Because of the magnetic properties I wouldn't try many of the routines that's taught on the dvd in the real world. It just looks too obvious and I'd be afraid the spectator(s) would come up with a solution that would probably not be that far from the truth. Remember, if a spectator convinces himself of a solution to the mystery, true or not, the illusion is ruined. But there are a number of really great illusions that can be done with this precision set. The 'coins across' is my personal favorite. The dvd is even hand autographed by Mr. Wong, which is a cool bonus. This may be expensive but i'm very happy with it. It's just so different from the norm and precision made in Johnny Wong fashion.