I have never been a fan of these but I figured why not. I drink so much coffee and dark beverages that it is starting to show, I simply can not have that happen, my smile is one of my best features I believe. So I decided to go with the crest white strips and they are fantastic. I see drastic results and on top of that I also use baking soda while brushing my teeth, it helps tremendously. I do recommend the crest white strips and baking soda are a great combo to get those whites pearly.