[This review was collected as part of a promotion.] I wanted to love these! I even made sure to take a before photo of my teeth hoping for a dramatic after pic. I really tried to use them consistently, but I know I have sensitive teeth so I started with every other night. Even that was bothering my teeth so I just fell off the wagon and can only use them sporadically. They’re easy to use and I’m sure they’re effective if you have teeth that can handle it. I’ve yet to find a brand that my teeth like.

Love using these every so often or before a big event!! I decide whether or not i leave them on for the whole hour or sometimes half depending on the sensitivity of my teeth. These work VERY well to whiten my teeth and i would definitely continue to purchase despite the expense.

I bought these because so many people swear by them but unfortunately I didn't get the results I was hoping for. They made my teeth incredibly sensitive so I couldn't use them every day which may be the reason I didn't get good results, but they were disappointing on the whitening aspect. I will be looking to try a different product next time.

This product definitely works. It does not work overnight, but it works within a few weeks. It is really easy to use and apply. However, I have noticed that my teeth definitely do feel a little sensitive to the air/cold after use. I would recommend drinking fluids and drinks with straws to prevent staining because whitening kits do tend to damage the teeth. 

After my daughter had her braces removed, her teeth were looking a little dingy. We purchased the Whitestrips and OMG her teeth are absolutely gorgeous now! Thank you Crest for the great new smile. As a mom, I was thrilled to be able to buy a product from a company I trust and not break the bank either. You're the best!!!

These work fairly well. They do what they say they should but if you don't use them for a few days then you will start to notice that your teeth seem to loose whiteness. Idk if that's just for me but that's the only thing I wasn't a huge fan of. Other than that they're easy to use and seem to do a pretty good job and work quickly.

If you're looking to whiten your teeth ASAP these are the strips to get. They're at every drug store so they're super accessible. The leave a little sensitivity but it's not terrible. You can see whitening results pretty immediately but over time it works best.

Honestly we all know these work great. Reviews don't do this product justice. Go out and buy it to see for yourself! It's not super uncomfortable and it works long term unlike most teeth whitening products that just leave your teeth white for a day or even less!

Good for special events or pictures when you need to brighten your teeth in a pinch. You can definitely notice the brightening by a few shades, however I find the effects do not last very long and they are a bit pricy for a box of strips. I would imagine these are also damaging to the enamel; however, they get the job done for when you need them!

Crest Whitestrips efficacy has become reliably unpredictable. I've used Crest whitening strips for many many years and always had stellar results, however, sometime in the last 5 or so years, the branding and varieties have become so diluted that 1) there is clear or understandable differentiation between the sets and 2) the results are so incredibly lackluster that you're left wondering how these are being marketed has "professional". I learned that years back, I had better results from boxes purchased in stores rather than online because store temperatures are typically regulated better. However, after this last set of professional effects, all whitestrips truly are a total gamble. There must be a reason their "highest quality" strips are always 50% off.