Bought mine in the store, knowing how well they work. I used them years ago and my teeth are still white but I wanted a bit of a refresher. I never stray from the crest professional effect strips. They work the best. I get compliments all the time even after years of not using them.

I love these strips they make my teeth look alot whiter when I use them. The only thing I didnt like is that I have sensitive teeth and this was a little painful for me and made my teeth really hurt for about a day but the results are amazing . I think its worth it .

I love these. I use them actually two or three days in a year and people stop me on the street asking me if my teeth are veneers or they compliment me on the whiteness. Oh leave them on the recommended time. A few times I left them on much longer in time and it made my teeth so sensitive, omg. I recommend it !

I'm wearing these white strips as I write this review LOL. I think these white strips do a great job. They do make my teeth visibly whiter. Just make sure to not go over the time on the box you're supposed to wear them or your teeth will be more sensitive the next day.

It really does the job! Whenever I have a special event or I'm wanting to impress someone, this is my go to. It's not that expensive when you look at the per strip cost and it definitely makes a big difference in how professional you look. I'm going to purchase this again and again and again!

I love this teeth whitening kit. Having a dad that's a dentist, he expressed how useful and beneficial these strips are. The one thing that can only truly whiten the outer layers and your enamel without stripping it away, is hydrogen peroxide. These strips contain a lower amount of hydrogen peroxide so it will just take a little bit longer to see results vs teeth whiting trays that contain a higher percentage of hydrogen peroxide. The main difference is the time it will take to see whiter teeth faster. These strips are amazing

I am so happy that Crest Whitestrips 3D Professional Effects exist! They whitened my teeth quickly, without pain, and removed stains I have had for a very long time. I will continue buying and using them as needed, and highly recommend them! They also make my boyfriend more kissable (but don't tell him!) Julie from Glendale AZ

Unfortunately, I've been a smoker for over 10 years now & this is my first time whitening. Granted, my teeth weren't horribly stained to begin with. I noticed a difference within the first week of using your product. Now that I have used the entire box, there's a huge difference! Thankyou so much & keep the good stuff coming! ;-)

I use this product to take away all of the stains from drinking so much tea lol. While they do work, they do take a little while and it does dry your mouth a little. Regardless, I still recommend this product to those that are looking for results that show.

I got a 2 pack of 40 whitening strips. I used to use them about everyday for 30 minutes, but then forgot about it and got busy. When I was doing it everyday, I could see progress with my teeth, but then it went away when I stopped being in the routine of doing it everyday.