This product works great to whiten teeth. The strips actually adhere to the teeth so it does not move around a lot while you are using them. If you tend to have sensitive teeth or sensitivity every once in a while do not use these strips back to back.

so i purchased this. i used 4 treatments four days in a row and I noticed that my teeth looks really white. However, i forgot to keep going and used the strips again after 5 or 6 days. my teeth went back to the old color after 4 days after using the first 4 treatments. so now i have five more to go. i really wish i used the 14 treatments for 14 days in a row. I'm not sure if my teeth will go back to the same/yellowish color after doing the 14 treatments again if i purchase another kit.

A little pricy, but I did notice a difference in my teeth! I've used these a few times when I have an event like a wedding coming up! It for sure works the only problem I had was after using this I had some teeth sensitivity, but besides that great product!

I've been using crest 3D Whitestrips Professional Effects on and off for nearly a year now and received better results than I had expected! However, the last box I purchased left me more than disappointed. Nearly half of the strips were damaged and unusable, almost as if they were damp when sealed in their individual packages. Major disappointment, but definitely won't keep me from future purchases.

My teeth have never looked so great, love flashing my pearly whites thank to Crest! Crest and oral B are the only oral products my hygienist recommends. Fantastic product, keep up the great work Crest! So happy to be able have professional results in such a short .period of time at home.

I used this product after noticing my teeth were stained from smoking and drinking dark sodas. It really works great after only about using three strips I noticed a huge difference of about three shades. After i was done with the entire treatment I would say i've went 5-7 shades whiter! I use these every month once a month to keep up the whiteness and its great everyone notices how white my teeth are now :)..... I would recommend these to everyone!! XOXO

My teeth are rather normal off color and not a whole lot of nasty. I don't drink coffee, smoke or drink red wine. I used the Crest mouthwash and Crest toothpaste while I used the Vivid strips, which didn't work. Then, I used Professional Effects and it didn't do anything either. A friend gave me an extra ten packs of ProEffect strips also. So, I was more despondent than anything.

I was very nervous at first, however, I jumped the gun and purchased the professional effects. Right now I have used 16 out of the 20 strips and I am so happy with the results. I used to have really yellow teeth and the treatment so far has lightened up my teeth at least 3 to 4 shades. It is very much noticeable to the point where I may not even need the extra 4 strips. The only side effect (as expected) is the teeth sensitivity (though no gum issues for me), which lasts about 3-4 hours post treatment and goes away after that. I rarely ever post reviews but I am very pleased with this product that I felt compelled to do so. Will definitely repurchase in the next few years.

I have been using those for years and they never disappoint, I have very sensitive teeth and because of drinking tea and coffee, my teeth yellow easily, and I have tried other products, but this product is what I stick and I gave up changing  , prize could be a little better, but you get what you pay

These are amazing! out of shame, i do have tartar teeth that actually still looks discolored even after brushing daily. But because of this, the differences have actually proven. I love it tooo much, this is actually part of my hygiene daily routine :) Thanks again!