I have not had the chance to use the free trail because I just got it last week. I recieved another in the mail today and the letter informed me I was charged $88.97. I was unaware that I was going to be charged this without my knowledge. I called to canceal and I am writing for a refund of $88.97 to my card and please let me know where to mail back your product. Thank you! P.S. Teeth whitening cost less at my dentist! read full review »