I haven't tried it, but heard horrible things about their billing. You have to submit your cc number for the free trial and then they charge you a bunch of times and send out more patches that you didn't order. There's something in the agreement about it. I'm staying away from it for that reason alone!
And, it's probably just another gimmick.
I know of someone who tried it, and it didn't do much really. It's all phsycology, and the sellers of this product all they want is your initial sale money and that's it. Its a rip off
Oh, and if you read the website, it is very easy to cancel the autoship - you just ring a number or email them within 14 days and they cancel it for you without any quibble whatsoever.