Their "trial" offer is a joke and it's on the consumer. They secure your credit or debit number to charge you shipping only $4.98. Good deal you think. Their trial clock starts running when they send it out, regardless when it arrives at your door. I had not even had time to try this product out before my bank notified me that they had already pulled another $99 from my account. The bank could not stop it, their email address is not monitored, so you get an automatic reply. A phone call to a number my bank gave me finally produced a return call in which the employee said simply and quite tersely "we will cancel further orders, but we will not refund your $99." Save your money; go to your dentist for a whitening procedure.