This effect is one I carry all of the time. I replaced a lost Johnson set with Tango-which is okay-I know they've become popular, and are more 'reasonably priced'-but the coins are not as solid as Johnson. This effect has the element of SOUND. And while NO shell will ever sound like a solid coin, the Johnson gaff sounds closer to a complete coin, weighs more, because it is more substantial by design. Also, Tango's instructions-even though I know this effect for decades-are some of the worst to try to read through. I seriously wish that that company would address this issue, and get a translator on board.
Enough-this effect still KILLS, needs no bang ring, I love the number three, the Chinese coin with the hole adds further mystery in terms of flavor and function-and Johnson's version is well worth dropping a few extra dollars on.