So these definitely work great but the using part is a bit tricky. They do not stick well to your teeth and generate a lot of spit. I highly recommend taking a towel and drying your teeth before using to aid in the stocking. But trust me they work you just have to deal with the small hassle of using them.

Expensive and uncomfortable...have to put those strips and endure an hour of disgusting foam in my mouth everyday. The strips are made small now so they have trouble sticking to my teeth...i can see them slightly whiter but not worth the trouble or money

I'll be honest—I didn't see much of a difference with these. I had coffee stains and I expected them to be much whiter after using these. I will say, they didn't cause me to have much sensitivity after use, which was nice and for the price, I did see a slight difference.

I was pleasantly surprised by their kit. Very easy to use. Didn't make my mouth feel “weird” and my teeth feel and look better after only a few uses. I'm a heavy smoker and coffee/soda drinker. Always look out for coupons in combination with sales at the drugstore or grocery. Best time to buy.

I've only used maybe 5 treatments so far but I can already tell a difference. I drink coffee (a lot of it) daily and started to notice my teeth looking a little dark. I have veneers in the front and I know that these don't whiten them from their original color, but they are lightening the coffee staining. I love that they made them no-slip also, as the old version would slide all over and made it difficult to talk. These things stick on HARD and pulling them off sometimes seems like pulling off a new band aid.

You might get a lighter shade but you may pay the price with tooth sensitivity!! Start slow with this product, only use for the recommended time, or less. Maybe build up to the full amount of time and see how your teeth react. Just not worth the aching teeth!

I saw all the great reviews about this product and was so excited to give it a shot. I did everything the instructions told me to but it did nothing for my teeth at all. It especially sucked because it was so expensive but oh well that's what I get for believing reviews online. I was really hoping these would work for me.

I was so excited to buy my Crest 3D whtie strips. I did exactly as the instructions said and I was so disappointed. So all that money down the drain. I'm happy for those that received good results but I think Crest should stand behind the product when it does not meet the expectations of it's customers, namely, me. :-(

These strips do certainly make your teeth noticeably whiter so they do what they say they will do. In my case, they also make my teeth very sensitive after just a few applications. The sensitivity does go away within a couple days after discontinuing use. I still use them if I need a whitening boost (which I see after just one application).

I knew this product worked super well when me dentist complimented me on how white my teeth looked. I was in total shock! I try to use white stripes 1-2 a week. If I have a special event coming up I will use more often. The price is pay is so worth it. It's almost like a professional whitening at home that you can afford!