Disgruntled sigh. I really wish the description tells you there are additional purchases of items (a gimmick, and a small list of other things) without which you can't perform VOD -- not to mention a more-than-usual amount of prep work. I don't mind having to get more things than the actual effect/method contains, and I happen to enjoy more DIY effects -- but neglecting to tell the customer what is really required is bad form. Scott Guinn is a very clear teacher, he gives ample alternative methods along the way, and I love his light-hearted style of entertaining patter. I'm disappointed by sin of omission in the description.