I currently use it to close my stage act. It's superb but.....
Do not buy this effect unless a) your act is completly mentalisim & b) you frame your mentalism as suggestion.
I say this because
1) although it is easy to perform it will fall flat on it's face if you put it in the same act as card tricks or, god forbid, sponge bunnies
2) It makes no sense unless your act is as I've described
3) This is full on pro magic - I've begged Peter to stop selling it. If you buy this effect and use it any other way that as I've described you will cheapen it and ruin it for performers like me - I will find you!
I can find no better way to describe it than the blurb on Peters website - it does exactly what it does on the tin.
Please don't buy this effect!
Doug