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. 

These do whiten your teeth. Yet I have very sensitive teeth and they make my teeth hurt so bad! However my mom has normal teeth and she has no issues. Crest 3D Whitening White Strips With Advanced Seal Vivid I inserted a picture of me after using this product. It did make my teeth very white.

I started using the whitestrips a few months back and loved the results. Everyone noticed the difference and gave me compliments all the time. I did have sensitivity but just went from using everyday to every other day to once a week. Once my teeth were as white as I liked it was fine to only use them once a week to maintain. My sister was a bit jealous of my results since we were always known as twins even though we are a few years apart we look so much alike. Our teeth on the other hand were now very different. I gave her just three strips to use and now she has purchased her first box. We are now both lifetime costumers. Thank you so much Crest for a great product!

Crest professional effects is so easy and it whitens incredibly !!! I always get compliments on my white teeth and when I tell people that it is from crest whitestrips they are shocked !!! It looks like I got them professional done !!! Awesome product !!! Worth every penny!!!

I haven’t tried a ton of whitening strips, but I’ve used this a few times. It works pretty well, but I personally don’t have the patience to be gagged by teeth whitening strips. If you are the kind of person who would do anything for their teeth, this is for you.

My 16 year old daughter wanted to whiten her teeth, and my dentist recommended Crest Whitestrips. I really wish I could post the "before, during and after" pictures we took. Amazing results, we can not believe the difference in just 7 days! I would definitely recommend trying these.

I LOVE WHITESTRIPS. I don’t use them often because they are expensive but they work and make your teeth look so good and clean! These are tried and true and never fail! You won’t be disappointed I have them in my amazon cart currently!!! Love love love!

Why spend big bucks going to a dentists office for whitening when you can get great results from the Crest 3D White Whitestrips Professional Effects? I tried them and received instant results that were amazing. I'm 69 years old and the lifetime of stains disappeared quickly, and completely. This product is outstanding.

Bought these strips...did the entire treatment and saw little to no difference. As a college student who couldn't afford these in the first place...I am so sad to have made this purchase. I don't even have a receipt to get my money back. DO NOT recommend. :(

I tried these for the first time a few months ago, because I was embarrassed about how my teeth looked. Within just 3 uses I could notice a difference. I did notice some sensitivity on my gums so I have to position them just below my gum line, but they have truly changed my smile! They are pricey, but it’s so worth it!