2 Best Teeth Whiteners -- and the 4 Worst
See which products made our testers smile -- and which made them gag
How long it takes: 10 days
Pros: "I had no sensitivity, which I have had with similar products (like Crest Whitestrips) and I noticed results within a day. After using the product for 10 days my tooth color [changed three and a half shades]." -- Robin, tester
Last word: "I would definitely use this product again. It was quick, easy, pain-free and a great kit for those who need to brighten up their smile."
SEE NEXT PAGE: So-So: iWHITE Light Activated Teeth Whitening Kit, $65.29