Total scam. 21 day free trial is from when you order, not receive product. You will be billed on the 21st day for full price and another order will be shipped. The 90 day money back guarantee does not apply because you now are a recurring order and they will keep your money. They are inflexible and do not care whether or not the product works for you. In my case it did not help. They will give away future business to keep your $$$.
AVOID THEM LIKE THE PLAGUE! You can return the product, but they will not refund your money.