HOLY MOTHER OF GOD THESE HURT!!!!! I've had braces done before and am wearing retainers now. Using these was a bad bad idea. Yes they whiten a bit. But they made my teeth super duper sensitive. and my teeth hurt!!! so much that i couldnt sleep, broke into tears and all. I have 2/3 the pack left now, and have half a mind to throw them away. But they're 50 bucks!! =(

I've used the Advance VIVID and this Professional's line and the Professionals DEFINITELY whitens better. I saw results within the first few days. YES it does make your teeth very sensitive BUT if you use Sensodyne toothpaste it makes it soo much better! And it is a bit expensive compared to other whitening kits but it's worth it cuz it works and it certainly beats a $500 treatment at the dentist chair for pretty much the same results! I'd definitely buy the Professionals again. But if the sensitivity bothers you than I'd recommend the VIVID instead. It's a little less harsh but takes a little longer for results so it's up to your judgement. My favorite part about the Crest whitestrips is that it seals PERFECTLY and doesn't slip or slide on your teeth. It fits comfortably and I can just put it on and forget about it for half an hour. I'd totally buy again!

I've used these whitestrips for 3 days now and have already noticed a difference in the whiteness of my teeth. There is some sensitivity while using them but certainly nothing terrible. It didn't even stop me from drinking ice water or eating ice cream. Just mild discomfort. Certainly worth a little discomfort to be able to have a nice white smile! The best part about these is that they don't have any sort of nasty flavor! They also don't shift around on your teeth. With the results that I'm already getting, I can't see needing more than 7 strips to get the whiteness I'd like. I can easily see this pack of 20 strips lasting me over a year. What a deal!

These things are fantastic, and a total bargain compared to professional whitening!! I was on the verge of forking out a fortune to get my teeth whitened at the dentist, and am so pleased I found out about these instead.

I have naturally quite sensitive teeth, and after reading lots of reviews saying that using the strips is agony, I was expecting the worst. However, I took the advice in one review and started using sensodyne toothpaste whilst I was using them, and I never even had a twinge. My teeth look loads better and I'm delighted with the results.

Top tip - it says to use them twice a day for 30 mins, but I eventually realised (doh!) that if you can tolerate them ok then it's a lot more cost-effective to use them once a day for a hour. That way your pack will last twice as long.

HG for me!

They stick to the teeth very well and don't move. They don't have a nasty flavor. After around 5 days I started seeing results. My teeth weren't yellow however they weren't white and so I felt insecure with bright lipsticks. Especially my upper canines were a little darker than the rest. I also wanted to get rid of a few stains I had because I used to be a coffee drinker. After the 20 treatments my darker teeth were the same as the rest, the stains were gone, and all of my teeth went quite a few shades lighter! I also used to be darker around the crevices and now they are an even color all over! If you ask me, its soooo much better than paying a fortune at the dentist. People who I usually never talk to complimented me on the whiteness of my teeth, and my boyfriend who hadn't seen me in two weeks immediately noticed the difference (and then bought it as well). I didn't experience any tooth sensitivity at all. I recommend not doing this immediately after brushing you teeth since you might have some cuts and the product could sting. it's now been 3 months and my teeth look just as white. Would definitely buy again if I need this, although I don't see it happening anytime soon.

awesome

First let me say that while i do appreciate crest coming out with a product that actually adheres to the teeth instead of sliding around i do believe that if the vivid version had the same adhesive it would work just as well as the professional effects and at a fraction of the cost... with that being said these do indeed work and while my teeth prior to using these were not at all bad considering i am an avid tea/coffee/ drinker and berry eater i did want a more prominent white for my college graduation. At first in my quest i did try the vivid version of the 3d whitening but hated the slip effect they gave despite being as patient as possible. After finishing up half the box and seeing an effect but realizing that it would take more strips i decided to purchase the professional effects. After using these once i noticed the same amount of effect that i gained out of 5 treatments of the prior, which was a major plus. However, the next day i experienced such a sensitivity that completely threw me off that i could barely concentrate; especially on my lower set of teeth. I figured that perhaps i had left them on too long considering that i wasn’t counting down the minutes till removal as i did with the former. Now with that being said i tried them again about 4 hours ago and not only did i make sure to take them off after 30 minutes but the sensitivity is mind blowing and disorienting; so much so that i had to take and ibuprofen to thwart the pain. Final verdict, yes these do work, and relatively quickly but god do they hurt. don’t attempt to wear these on a busy day. and for reference my threshold for pain is high and I’ve very rarely ever experienced tooth sensitivity before

A few years ago I bought Crest White Strips premium for my mom, and she left them laying around the house for a while, I completely forgot we had them till I found them in a closet. Anyway, my teeth were always pretty white, but I figured I can make them whiter. So I tried using them.. the instructions were 2x a day 30 minutes each time. So I did so for about 3 days and saw very little results, the strips were annoying and moved all over the place, and then one day I looked at the package and found they were expired. So I decided I wanted to try the Advanced Seal Professional strips just for fun, they were MUCH better than the Premium (maybe b/c they weren't expired, or maybe because they ACTUALLY stayed in place, and I only had to use them once a day)... so I was pretty excited about these, I used them for 2 days and on the third I felt this SHARP, intense pain on my lower tooth. The pain persisted the entire day & my teeth became sensitive. But I could definitely see the results!! the next day I went to see my dentist, he told me not to use them for a week, but I tried them after 24 hours anyway ... and OMG was that a mistake, after 10 minutes of them on I felt that sharp pain times 10! and I pulled off the strips and sat down to write this review. My teeth were never sensitive, now they kind of are but I hope it goes away. I think I'll try the strips again in a few days, even tho I dont need them. I dont wanna waste the 50 bucks I spent. continued >>

Love this whitening kit. I notice whiter teeth after just one use. Makes my teeth a bit sensitive after use, so I can only use them every other day or every 2 days. Would def. repurchase and already have done so! Affordable if you use a $10 off coupon.

I love these! The original WhiteStrips launched when I was in seventh grade, right at the moment I got my braces off. My mom bought them as a treat for me, and I've been faithful ever since. However, this product has really stepped up its game even more. The new advanced seal is AMAZING! No more lifting or slipping, and boy do they stick! I can even drink water and talk much more easily than with the older versions. I like to whiten my teeth pretty often, but even so I can see a great increase in the vibrancy of my tooth color with each use. They are on the expensive side, but they really do work! Even my friends - some of whom play sports and often end up toothless - notice how bright and glowy my teeth are.

I have two uncles who are dentists/dental surgeons. My mother got her teeth professionally whitened in the office, but my uncles recommended these for me. She drinks lots of coffee, I drink lots of dark sodas. When we compared results, my teeth were actually whiter and brighter! I swear by these. They work better than the much more expensive sets I've used, namely GoSmile B1 Whitening. They are so easy to use and fulfill their promise - I'm a lifelong fan.