I really don't know about that. I mean, if its still on pre-order, you're hearing quotes and reviews from people who have the trick but don't necessarily use it or even own it. A lot of times the creator sends a prototype to a few people and then collects good quotes form the select few. If you're lucky, you get to keep the trick, if not, you send it back with your review attached.
For example, remember "the gecko"? it claimed in the video to vanish "virtually anything", be "easy to setup", and if that's not enough, a "fast reset". First off the bat, all of those things are subjective. What is "virtually anything"? and does it include, say, phones? How easy is "easy"? And how fast is "fast"? Because "The Raven" wasn't fast at all. And then people started paying out the ass ($75 with cheapo shipping) before they read a single review and had heard the problems like "its noisy", "you have to walk around with it loaded all the time", and my favorite, "it doesn't teach half the s**t in the preview video"
And about Paul Harris, in my opinion its gone down hill since he stood behind "Tattoo Joe". But that's just me.
Bottom line: Read reviews from 3rd party sites and then make your decision.