For me,this worked. The minted flavour is so strong it almost burnt my mouth! While it did slightly whiten my teeth,it didnt get them 3 shades whiter like it claims to and my teeth didnt start getting whiter until I used it with an electric toothbrush.
It would be good for someone who only has very slight discolouration or someone who wants to maintain the whitness of their teeth
I got very excited when i first saw this on the TV! But i have to say it did nothing. The texture was thick and the smell wasn't overly fresh. I didn't notice my teeth were any whiter over the 4 weeks of using it. My opinion, give this one a miss...