This product is very effective and very easy to use. The only downside is- if I try to suck back the spit buildup (I know, gross) then I get shooting pain through my teeth. I have multiple family members who have this sensation no matter what they do when using this product. But, I have continued to use this product as it is affordable and works well into my nightly routine. As warned on the box, it can make your teeth a little sensitive for a few days after use, but I only occasionally noticed this and it was not sensitive enough for me to change any food or beverage consumption.

I recently started using whitening products. I heard from a friend that and she highly recommended it. I see noticeable results just after one use. I try to use them twice a week because I have sensitivity. So that's my only downfall but that might just be me. Try it!

These made my teeth super white. I didn't notice my teeth getting sensitive but I know a few people who couldn't do the strips multiple days in a row because it hurt their gums. I have a high pain tolerance in my mouth though so I didn't mind. They work great.

I really love these because they work! I have to say, they're expensive but worth it. Know I have super sensitive teeth, so I can't use them all the time.. But when I do, I only put them on for 15 mins. Not longer, or else my teeth with really hurt. I do recommend if you you'd like have white teeth within days. 

Literally just finished using this product. Im going to start doing it everyday. Feels sticky at first and then slimey but once you spit it goes away. My teeth feel clean. Wasnt bad on my teeth didnt irritate. Doesnt have a bad taste pretty tasteless honestly. Going to keep using and see how this does.

I've only used them for a couple days, and already my teeth look a little whiter. I have tetrcyceline stained teeth
so it will be a little less white than others, but it will and is already working!! Looking forward to seeing how much
whiter after 14 applications.

If you're in a pinch and need a quick whitening this is your product! All of the different whitefish strip treatments that Crest offers are great! Been using them for as long as I can remember while trying other brands and Crest has always been superior.

This is the OG right here, I don't think it gets much better for this (unless you were to buy something professional). I have used this product for a few years now. It has become an "old reliable." I recommend that anyone try this product if they are experimenting with at-home teeth whitening for the first time!

I am only 5 days in and I have already noticed an extreme change in color of my teeth. You wear the strips for 1hr a day. The strips are big, so I cut them in half (horizontally) and get double the use out of them. My teeth are usually sensitive and I have not experienced much sensitivity at all throughout the 5 consecutive days I have been doing the treatment.

I use this 2 week set and also the pack that you use during the 6 months between when you're supposed to use this. I love this and see a visible difference every time I use them. They're a little pricey, but only buying them twice a year makes me not feel as bad about spending the money.