I love Crest Whitestrips. I used to use them a few times a year and had the whitest teeth, they would glow in black light. But not unnaturally white. Just free of stains. It's an excellent effective product, a little messy though and kind of a production to use but worth it all. The strips have a whitening gel on one side that molds to your teeth. You leave them on for a certain amount of time, I think it was around 30 mins but don't quote me. You can watch a movie or distract yourself while you wait, drooling a bit and occasionally adjusting the strip, which might numb your gums just a little. So much fun. But again, like I said, it's really worth any mild discomfort for the noticeable whitening effects that are much better than toothpaste alone. I hope to buy some again soon.

I purchased the Professional grade strips in hopes that they would brighten my smile a few shades, but after using them for nearly 4 weeks, I've not seen a significant improvement. I had high expectations based on some of the reviews, but unfortunately, these fell flat along with my smile.

I swear by these! Every time I have used as directed, someone has pointed out how white my teeth look (I generally used about 2-3 a year.) I get minor tooth sensitivity, but the results are well worth it and it doesn't last very long. I have tried store brand versions, but I feel like I get the best results with these.

I use these every few weeks just once and it is amazing. I use it for the boost when my whitening toothpaste just it's t fully cutting it or a day before an event. My teeth do get sensitive so I use an enamel building toothpaste to combat that. Highly recommend

These whitening strips definitely whiten your teeth. I have only tried this brand and it works great! I do wish the bottom strip was longer though, it only covers a few teeth. It would be great for both strips to be long enough to cover all your teeth! After a while it makes your teeth sensitive so I recommend using them once a week or when needed because it does hurt at time.

The best way to whiten your teeth! I get comments all the time for my white teeth and my dentist actually told me that I have a "movie star smile." You don't have to use them all the time to get results either. I used them every few days at first but now I only use them every few months. Highly recommended!

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!

this product actually whitened my teeth!!! I was a little skeptical at first, but it worked after my second use! it does make my teeth feel a little sensitive, so I try not to use it too much, but I will definitely be repurchasing this product after I run out. 

I love these strips I always get told how white my teeth are. Use this with the matching toothpaste and it's the perfect combo. I do wish that my teeth didn't get so sensitive to cold food after using these but that's just a personal thing. These are amazing.

Love this teeth whitening kit, although I've only purchased it once because it's kind of expensive to constantly buy them. My results after a use of them were shocking, I definitely saw a difference in my teeth in a good way. I would purchase this product more often if it wasn't so pricy for my budget!