The gimmick to the trick is absolute genius although I doubt it costs 30 dollars, not to mention it is fairly fragile as mine broke within the 24 hours of receiving it.
However, it is as visual and easy to examine as the DVD says it is!

If you are doing this for a quick reaction or a video online this is great. Its a neat little gimmick that you can use to produce words on the side of the deck. I wouldn't use this in a show because the entire effect (even if you were to have someone pick a card at the beginning) can't be any longer than 1 minute. But if you want something for your demo reel or need to make a cool quick youtube video, this one is a winner and looks great on camera. The gimmick is small and discreet and can easily be ditched for a clean finish.

Simple and memorable! Easy to do, do it surrounded and makes a great give away item. You owe it to yourself and to your audience to get this little gem.

This a great idea and the trick will play well in any situation. Great magic!
But...it's very fragile. Did the effect less than 10 times and it broke.