Hello Again,
I apologize, but I have forgotten a few details in the review.
Something people may not like about the STS gimmick is that you HAVE to be wearing long pants such as jeans to perform this. This may not be convenient for strolling magicians in the summer or on the beach. That is really the only drawback of this effect.
Something else for those of you that may not already know: Do not try to perform this effect for other magicians. Almost every magician in existance knows about or owns the STS gimmick. I have been in many situations that, while walking around at an IBM meeting or magic convention with the gimmick set up, magicians will not point out that your laces are untied. Most of them have said to me, "Self Tying Shoelace! Very nice!" This may not happen for you, but if you are going to show this to a magician, show it to a beginner that hasn't heard of Penguin Magic yet
Other than that, the STS is a perfect close up illusion that can be used at any venue for any type of magic.
Michael Kras