I got these strips at a travelling sale with many different products for a decent price. I have tried Crest White Strips, Crest Whitening Gel and dentist trays previously, and these Listerine Strips were definitely the worst. They do whiten, although it is not as quickly noticeable as the other products I have mentioned. They are goopy and very hard to apply, touch them accidentally and a goopy string will pull away from your teeth and half of the product will be gone. Also, you are supposed to swallow the product, which is quite a disgusting thought. I kept them on for a few minutes and was disgusting by their clumpy and sticky feeling, it took quite a while to brush all of the junk off my teeth. The only positive about this product was that it did not cause sensitivity to my teeth like other products do. If you're okay with swallowing a mouthful of chemicals, crafty enough to get these strips on your teeth, and you get them at a very reasonable price, give them a go, otherwise... try something else!

This particular whitening system is the most difficult to use that I have tried. The extremely thin strips became tangled prior to application and stuck to my lips as I tried to place them on my teeth. The taste is awful and takes some time to get used to. Each strip took about 20-25 minutes to dissolve, which is much longer than the box suggests and bits of the product remained between my teeth and required brushing for removal. I did manage to use the whole box (minus the first few that became so tangled during application that they had to be tossed) and saw very little results.