So expensive so four stores. But they do work. I recommend doing top teeth then bottom rather than both at the same time. I personally noticed a difference in the matter of using it only a couple of times. Make sure you get the ones that have a strong adhesive so they stick to your teeth and don't slip!

I love these. They have transformed my smile to noticeably whiter! People ask me all the time how my teeth are so white. All of the white strips work, but professional effects is the best. I have a lot more confidence due to this product. Thank you Crest! :)

These white strips are great! They stay put, don't have a weird taste, and since they stay in place, you don't get gooey whitening product seeping into your mouth and gums. I noticed a huge difference after only one strips, and my teeth haven't been this white in years after using 5 strips total. Can't recommend this product highly enough.

I use these 4 x a year for maintance to keep my coffee stains at bay.  I don't experience any sensitivity or pain from them.  I don't like the sticky mess they leave on my teeth but its tolerable.  I don't like stained teeth and this gives me some control over the situation.

I use these all the time for when I have an event that I know I will be photographed at. They cause no sensitivity in my teeth and they work really well, especially considering the cost compared to the cost of a professional whitening treatment. Highly recommend!

I used Crest White Strips when they first came out, and they worked wonders. But, these 3D Advanced Seal strips are the new and improved version! These strips stay in place, and now I can talk while wearing the strips! (Before it was a challenge to talk while wearing the strips). With these new 3D White Srips there is no uncomfortable flavor even after I remove the strips. Best of all, I noticed a color difference with my teeth after just two uses! Totally recomend these to anyone who needs to brighten up a smile!! :D

Pricey but so extremely worth it! Everyone asks how my teeth are so white and the secret it out! This product is safe for your teeth and doesn't oversensitive them. For a deep whitening treatment head to your local dentist, but follow up with this product to keep those coffee stains off your pearly whites!

A bit pricey but I recommend everyone trying these before getting a professional teeth whitening job done. They are super easy to use and definitely work over a period of weeks. I usually have some left over in the box after purchasing that I can touch up with.

Great product, my mom says she can really see the difference in just one use! I don't use these that often but every once in a while works well for me. My only issue is that my teeth appear patchy white after but that goes away after a few days and it can make your teeth sensitive warning!

My teeth have always been fairly white, but I'm an avid coffee and wine drinker so they eventually started loosing that sparkle we all love in a smile. I've used my brands of whiteningsheios and other teeth whitening products and never got the results I truly desired so kinda gave up on it for a while and just did my twice a year dental cleaning worh whitening 1x a year but after 5 months it so, again, I'd lose the sparkle and desperately wanted something to use at home so my sparkle would return and thought I would get this gayer seeing great reviews for what I thought would be just a "little" help getting that fresh, whitened look back, because again, I didnt have alot of hope in anything at home but figured this may do a lil something. I used 1 set and they looked good as new & look veryyyyy natural!! I honestly was blown away, and thought I would have to use multiple ones over time to achieve the beautiful look I have now! I am sooo happy with my results. They didn't immediately look whiter after taking them off, but they did when I woke up the next morning :)