Review (5/5): Not a gimmick... not for me.
This stuff is awesome. I have been fighting staining for YEARS. I barely drink tea, coffee, or soda. I brush my teeth twice a day with a sonic care toothbrush. I alternate between whitening and sensodyne toothpaste. Even after the dentist cleaning....my teeth never really feel white. Drives me crazy. I have been using this stuff twice a day for a week.... and I already see a difference.
If you have tried everything else, and like me want white teeth, give this a shot. So far I am pretty impressed