Hidden fees in their terms. Charged my Checking account for $88.98. Refused to give refund even if I send the product back. Make it difficult to send product back. Need confirmation number which could take up to 2 business days to recieve via email. Will not deal with issues over phone, but through email. DO NOT BUY THIS PRODUCT!!! Not worth the white teeth. Name brand strips work just as well if not better with no hidden fees and no hassle!!!