First, the trick plays best if you can do a really convincing, reliable false shuffle to start out.
Don't buy it if you don't have a false shuffle ready to go.
Second, the trick relies on
something that Rick Lax could have written down for you and posted, but instead he makes you pry it
out of the video by playing it again and again. When I suggested to him that he share this
information, I got an insulting reply.
So I'd stay away from this one, and I'd stay away
from someone who insults their customers.