I've only used them for a couple days, and already my teeth look a little whiter. I have tetrcyceline stained teeth
so it will be a little less white than others, but it will and is already working!! Looking forward to seeing how much
whiter after 14 applications.

[This review was collected as part of a promotion.] I have used crest white strips throughout the years, and I think the professional effects are the most effective I have ever used. I noticed a difference in the whiteness of my smile in 3 applications. I also really like that one package comes with two weeks worth of white strips. The only complaint I have is that I can only use them once every few days because they make my teeth too sensitive to heat and cold.

[This review was collected as part of a promotion.] I received the Crest 3D Whitestrips for free from Influenster in exchange for my honest review. After using the Crest 3D Whitestrips for one week, I definitely noticed a visible improvement in the whiteness of my teeth. The color looked noticeably brighter, especially around the edges where I had the most staining. However, I did experience bad sensitivity throughout the week—mainly sharp zaps during and after the treatment. While the results were great in terms of whitening, the sensitivity was tough to deal with. If you have sensitive teeth, I’d recommend using them every other day or following up with a sensitivity toothpaste.

Used Professional Effects in the past with AMAZING results, as have many of my friends and family. So many people swore by it — and for good reason! It did exactly what it promised. So why on earth change something that was already perfected and loved by many? Change is not always for the best. The purple boxed Luxe should have been a permanent product. These new strips neither adhere sufficiently, nor whitens evenly, or even half as well as the former ones. Extremely disappointed in the change of line. I'll never understand why companies feel the need to "update" products that WORK. If it does what it's supposed to and impresses people with the results, then leave it alone! Loyal consumers will thank you by coming back for more. As it stands now, I will not be wasting further money on this overpriced junk. A real shame, since I would have repeated my purchases on the older strips for as long as it was available/needed. Don't cheapen your products. You were doing good work before.

I used this whitener as directed & the results were amazing! My teeth were stained with coffee & tea. These easy to use strips made my teeth a beautiful, glistening white so that my smile at my daughter's wedding was a real winner ...even in the photos!

I've used CWS Professional Effects several times. I was on vacation with my sisters and they asked how I got my teeth so white? I told them Crest White Strips - Professional Effects. As soon as they returned home, they bought a box and now they have beautiful white teeth also.

[This review was collected as part of a promotion.] I received this product for free from Influenster in exchange for my honest opinion. I used these strips exactly as directed for the full 11 day period. These strips stay on really well- way better than any other strips I have tried in the past. They stay on for an hour and you can easily talk with them on your teeth. Unfortunately, I can’t say that I see a noticeable difference from using these. I also have been noticing some sensitivity in my teeth that I didn’t experience before using these strips. I am always looking for a great tooth whitening product, but I don’t think this is it for me!

My teeth have always been fairly white, but I’m an avid coffee and wine drinker so they’re starting to lose that sparkle. I’ve never used whitening strips before, but thought I could use a little help getting that fresh, whitened look back. Used one set and they’re good as new & look very natural! So happy with my results. They didn’t immediately look whiter after taking them off, but they did when I woke up the next morning.

I received it as a part of my Christmas gift from my husband last year ( He knows me really well... I am a teeth freak). It turned out to be one of my favorite gifts. My teeth felt clean and sparkly. Coffee staining diminished as well. And now I truly hope to get a new box this coming December!

[This review was collected as part of a promotion.] I absolutely love these Crest whitening strips. They are extremely easy to use and come in little individually wrapped packages per use. I noticed my teeth looking brighter after just a week and multiple shades whiter after 3 weeks. I’m a coffee and wine drinker so I definitely had some noticeable staining to get rid of. They do cause a little sensitivity - when I noticed that I started using the strips every other day and that helped a lot. I’m really impressed how much whiter my teeth look!