These definitely work! You can see results after one use and people always tell me that my teeth are so white. The only downside is that it can make your teeth sensitive. Other than that, I highly recommend.

Though I wasn't very consistent with these, the times I did use them, I did not see much of a difference in the whiteness of my teeth. I could have been using them wrong but I wish I would have seen more of a difference

These things work!! That's it, that's really all I have to say. They work very well, very quickly. Only had to use.... maybe three, to get my teeth white. The rest of the strips I gave to my family because I didn't need them.

I have used this product for years and I am satisfied. A few years ago they made the strips stickier, and this was a great improvement. It makes it easier to use the strips and still do other things.

I found these to taste weird and I really didn't feel like they were working. I looked into them unfortunately after trying them and found that some people complained about increased sensitivity after using.

I love crest white strips. Feel like the are the most affordable with the best and fastest results. Only negative is if left on too long they hurt my teeth.

These are my go-to whitening strips. I only have to use them once and then I can go several weeks/months without using them again. I don't like how they make my teeth sensitive the next day or two after using them though.

The professional strips are incredible! I have very sensitive teeth and for my fellow sensitives: cut the strips in half so you do not have to wrap it under the tooth. I never get sensitivity when I do this.

These white strips are amazing! They really whiten your teeth and keep them white for several months. The only downside is they may make your teeth extra sensitive, so I would recommend only using them every other day.

I was kinda disappointed with how these turned out. I used them everyday for about two weeks. They didn't really whiten my teeth, but instead made them look splotchy.