First I want to say that every as seen on tv product I have purchased has failed to work. They are usually junk. This on the other hand, actually works. Okay, you won't get a drastic change in 2 days but you actually notice it after 2-3 days that it works. You know how I know it works? It has hydrogen peroxide in it, which is a key to how it whitens. Sure you can go buy hydrogen peroxide but its going to taste nasty and its not as portable and handy as this.\n\nI felt no sensitivity, and the taste is pretty good. Its simple and effective. I would think that after using this product for 30 days twice a day you would get the results you would like. If your skeptic, go ahead and spend the $10 and buy it. Don't get discouraged because its not an overnight thing. Your teeth didn't get the way they are overnight. Spend the money, follow directions, and you will see results. And you dont have to spend $40 on a crest whitening kit that does the same thing.\n\nSo yes I recommend this product and according to the company most users say they notice a difference in as little as 2 days but they guarantee you will notice within 30.\n\nGood luck and enjoy!\n\nThe only reason I give it 4 stars instead of 5 is because they try to oversell it on the package. But its definitely worth the value and it definitely works.