These definitely work great! They whiten quickly and easily. I used to use these all the time with no issues, but as I have grown older, it seems my teeth have gotten more sensitive & when I try to use them now it makes my teeth hurt. I just have been using the toothpaste alone instead.

I try to keep my teeth white, I drink coffee and tea so I have stains. I have used these on and off for several months and I think my teeth are whiter because of them. They take about 2 weeks of use to see a difference and they make my teeth very sensitive due to the constant use and bleach as an ingredient.

I love these strips when I'm trying to get my teeth white. They definitely do their job. However, they make my teeth very sensitive to cold things. When trying to drink really cold drinks my teeth are very sensitive or ice cream. I definitely recommend for fast whitening but if you have sensitive teeth maybe stay away from these.

These are SO amazing. Within 3 uses ( I used once a day) I noticed a big difference. Within 10 days other people noticed a huge difference. I got so many compliments on how white my teeth are from friends, family, and even just random people I talked to! For the first 2 mins of putting them on each day, my teeth were a little bit sensitive but after about 2 mins it went down so I was always able to make it the full 30 minutes. I don't notice any sensitivity difference when it comes to drinking or eating, always a plus! Highly recommend!

everytime i use these strips when i'm done i definitely see a difference. it's definitely whiter! however, it starts hurting towards the end of the time u use it for. at least for me. i don't have super sensitive teeth but ya. but the outcome is worth it lol

These are great I would love to tell you a success story about how my teeth have gotten whiter but I don't do the strips as often as I should in order to see the results, it does have a great placebo effect though and I always feel like they're working

First of all I have to say they work extremely well. Now, they do have one small downside, which is, they made my teeth very sensitive for a few days. I just powered through it, but it might be too intense for most. My teeth looked amazing after using them even once! They are my go to for teeth whitening!

I never expected this product to work so well! I purchased these a couple months ago and began using them. My teeth became noticely whiter in just a few days. I loved the way my new smile looked. I got so many compliments about how white and amazing my teeth look. I recommend this product to everyone wanting a whiter, sexier smile.

After speaking to my dentist she recommended I tried the Crest 3d white strips and after the first 3 times I was hooked! Not only were they brighter but somehow shiner too! They looked more youthful and glowy again! I've always struggled with my smile and even after brushing 2x a day I still wanted something more and these strips were it!

These hurt my teeth terribly, so I can't use enough of them to tell a difference. About 12 hours after I use one, my teeth start to throb some. To be fair though, I have some damage on my teeth from drinking a lot of sodas as a child. Would love them if I could use them! They stick to your teeth very well and don't have a bad taste.