this review title is: yes these really workbut keep a few things in mind and the content is: after very minimal and barely noticeable success with whitening toothpastes and gels i finally decided to give crest premium whitestrips a try previously i had found the cost to be prohibitive but the fact that or coupons are offered in our sunday paper with some regularity made the price a bit easier to swallowjust like the commercials say i definitely did begin to see some improvement after about three days i would describe the effect as more of a lightening than a whitening per se i could not detect anything while wearing them and after taking them off i thought that the gooey paste left behind was virtually tasteless i did experience some sensitivity in a lower tooth which i had capped over years ago although this sensation went away in time it was uncomforable enough to make me cut the lower strip to fit around this particular toothin summary i did see clear although not miraculous results from this product and i would be willing to try the strips again especially if the price were to come down a bit ultimately i would rate crest whitestrips three and a half stars as there is definitely room for improvement.there are other information for this review, one is this reviewer did not purchase it and the other is 30 people think this review is helpful.