I agree with the other reviews on the general practicality of doing the main growing ring effect
before live audiences. However there is another effect you can do with the two rings, one is finger
size and the other about 1 inch in diameter, that is not mentioned in the demo video. Dan showed
this additional effect during a lecture in the Baltimore area about 1 1/2 years ago, and I am not
sure off hand whether or not it is in the product video. I do perform this additional effect, so I
did get something out of this magic product.