i’m not entirely sure if they work- but they definitely do give me a bit of sensitivity both on my teeth and the gums around my teeth that the strip touches

I like the whitening strips but they also make my teeth feel super sensitive for a few days after I have whitened them. Other than that, they do give promising results.

Not gonna lie, they do make my teeth sensitive so I cannot use it every single day but I do use them every once in a while when I feel I need a boost. I think they do a good job

My teeth were immediately a few shades whiter and brighter. They are definitely effective and I don’t have any critiques for this product because it 100% met my expectations. I would buy them again in the future.

They are very efficient and effective. I use them at night. They don’t make my teeth sensitive. They work as long as you stick to a schedule when using them.

I love these! They’re easy to use and I’ve used them multiple times over the years for special events or when I feel my teeth are starting to stain. They can cause some sensitivity (so beware if that’s an issue for you)

Honestly, I've never been in such tooth pain. Used it ONCE for the correct amount of time, and the pain kept me up all night. I still can't eat or drink and it's the next day. My teeth are on fire and my gums are throbbing.

It was kind of a pain to use. The strips are unusually big. So I had it all bunched up in my mouth. I’d buy it again but knowing full well it will be a pain. It’s pretty pricey too. If it’s the only product on the shelf I’ll buy it.

I didn’t find these to be all they’re cracked up to be. They are super expensive and are hard to apply/keep on. They also leave a terrible taste in your mouth, if you can get them to stay on...

Crest White Strips are worth the price. I have gotten my teeth professionally whitened in the past but honestly the strips do just as much. My teeth are pretty sensitive to things but they feel just fine when I wear these.