Hi,
I reviewed their product here:
PsiPog.net : Product Review: The Gateway Experience - Part 1 by Peebrain
Overall, I did like it. I'm not sure if it's worth the money, but it did help, and with practice I did start to experience some weird things. Remember that you don't just listen to it and zonk out... you have to actively participate in the exercises. So it's not "easy" :-P. But it is helpful.
~Sean