I have used this several times with great success, but 3 times the spectator has called me out on
the gimmick (and it wasn't because my presentation was lacking)
For for just one gimmick that
will wear out it is a steep price for something that is not 100% surefire. I am not saying the
effect and method is bad--it is a brilliant trick but it is not fun when you are called out on an
"inspectable" gimmick. It may be good to have in your drawer if the perfect situation comes up to
use it but not unless you have the money to spare.