These whitening strips honestly worked over night. I was amazed by the quick results but you definitely have to keep the use up for them to truly stay and work. Overall an amazing product and would recommend to most.

I'm an avid tea drinker and I use white strips to remove the stains and feel more confident about my smile. These really make the difference and I get compliments about my teeth.

Love using this it does help out to whiten my teeth the only thing is it’s very pricey for my opinion but the product it’s self is great.Crest 3D White Whitestrips 1 Hour Express Teeth Whitening Kit

They made my teeth a lot whiter initially, so yay, great for job interviews or picture day or whatever, but it faded quickly and left some sensitivity issues, and also it's pretty expensive.  So YMMV. 

Best whitening strips. Use them maybe once a week and they work wonders. Use them regularly with whitening toothpaste and it gives you pearly white teeth

I’ve been using crest strips for years & I can’t recommend them enough! They work great, only downside is your teeth might become sensitive after a few days of using strips.

I work to keep my teeth feeling healthy and would love to know of more products that work as well as this one because I always come back to these ones and this brand!

I swear by these whitening strips. I’ve used a few other brands but none compare. These don’t make my teeth sensitive and are easy to apply. I would recommend these over any other brand.

I purchased the crest 3D whitestrips reluctantly, taking a chance,but the results blew me away I saw a difference in about a week or so. I continue to buy this product being a great investment!

Okay I can’t tell if these work. They seem to, but not a huge difference. Also the strips are incredibly uncomfortable and the longer you have them on, your teeth actually get sore from the whitening solution. Not worth it to me.