I do believe this works over time however it strips the enamel from your teeth and leaving it on for the whole time hurts your teeth. I do recommend if you use it once wait a couple weeks to do another

I was a little hesitant to buy these because they cost a decent amount and seem out of my price range on some days, but I gotta say they are completely worth it!! My teeth looked and (surprisingly) felt great!

I am using CREST its very unambiguous product.I love it.its reduced yellowish color quickly not an week its done in few days.Thank you CREST Team members......TEETH+CREST=WHITENING TEETH+OTHERS(COSTLY)=YELLOw

Noticeable difference in just one use. Easy application and easy removal. Doesn't cause sensitive teeth if not used a lot during a week. Would recommend to everyone wanting to get clear teeth without the risk of sensitive teeth.

Love love love this product! It's super easy to apply and they work so fast! I use this product a couple times a month now too keep my teeth pearly white! They definitely exceeded my expectations of this product! Would highly recommend!

Everyone always raves about this. I don't get it. It made my teeth sensitive and I've never had an issue with that before. The whitening is okay but not anything to keep me using it like people claim they do.

Literally the best and easiest way to make my smile sparkle. It doesn't hurt and it's so easy to use (I've had no issues at all). I get asked a lot when I use it what Doctor I use for teeth whitening

This product does work and does not cause as much sensitivity as other products. It's a good value and for most people will do exactly what they expect it to.

As an avid coffee drinker, whitening my teeth is necessary to keep the coffee stains away. These strips work wonders and I love how easy they are to use! I use it an hour a day for three weeks and can tell a noticeable difference.

I had put off my dental work and had family issues come up that made me totally forget to bleach to prepare for it. I bought these 5 days before and used them and can't believe how well they worked! And no sensitivity at all!