I received your CTI Homecare Dental Kit last Monday (one week ago today). I am in awe. I have literally watched my teeth whiten as I brush. Not only is the crown of the tooth whitening but, the exposed roots/Cementum has whitened as well. I am not sure if it is working so quickly because I had already managed to remove any/all tarter/plaque from my teeth or if it just works this quickly for everyone. Totally amazing and I am totally grateful. I wish I had found you 20 years ago as I would probably still have all or most of my teeth (certainly would have more than I have now). Additionally, my gums are now a healthy pink. ~ RB in AZ