Review title is Dr Song Teeth Whitening [SEP] Dr Song Teeth Whitening was not a winner for me.  My teeth are very sensitive.  Even after using the remineralization gel my teeth were hurting. It was gawd awful painful.  I can't blame the product for MY sensitivities however.  I CAN when it comes to effectiveness, or lack there of, in this case.  I gave the remaining product (less 2 treatments) to one of my sons.  He was diligent about how he went about whitening his teeth following instructions to the letter.  The results were disappointing.  Although, there was a slight difference in the appearance of color, it was hardly significant enough to deem the product a success. In the end, I purchased Crest Whitening Strips for my son.  Now, there's a success story.