I ordered trial samples from these 2 companies and down the road got a call from my credit card company about suspicious charges, both dentech & dazzelwhite had additional charges of $88 & $58 which I didn't authorize. I appears that when I sent the orders I unknowingly agreed to further shipments. I went back to their sites and found no mention of such an agreement in the entire body of the ads thus it was slipped in on the final order checkout and who ever reads those things anyway, like I read the agreements when I put software on my pc, who's got the time for that nonsense. Legally they got their butts covered but it's dirty business dealing with people like that so I consider this a scam...Bob