I gotta say, I heard about this product on Buzzfeed and was kinda skeptical. Ever since I had my braces removed like a million years ago, I had this one spot that had been "patched" and always made me self-conscious. I loved knowing that Glow-up does customized mixes and gave it a chance. I am incredibly happy with my results. Even my daughter (who is always honest with me) said, "Mom, your teeth really do look whiter!" I'm sold!