I try to use these at least once a month to keep my smile bright. I put it off a lot because my teeth feel very sensitive after. Also it seemed to do a much better job whitening in the beginning. The more I use it the less results I notice. Also a bit pricey.

These are my jam. My ride or die. I started whitening my teeth when I was 15 with them, well I think they were advance then, the most expensive box was how I could tell which ones. I live for these and they'll always be my go to. I receive so many compliments on my pearly whites.

I've used these for almost 8 years now. I get a lot of comments about how white my teeth are. I use maybe once a month. My teeth became more sensitive within the last year so I don't wear the full 30 minute. Wish I could find something that works just as well for sensitive teeth.

One of the most ridiculous and unfriendly kinds of packaging I've ever experienced. You need a buzz saw and armor to open a huge hard plastic/cardboard covering for two boxes which then contain feather light strips probably not weighing 1/2 oz. Not only a detriment to the environment but to the consumer!! Not worth the cuts, bruises and time to get to the little prize inside.

I ran into my eldest sister years ago smiling (she doesn't normally show her teeth) but as soon as she smiled at me I KNEW she had been to the dentist, but boy was I wrong! She had introduced me to crest 3d professional effects and since then I have been hooked!! I cannot believe that they actually work!! I drink a lot of coffee and was a smoker for years and I can use a strip a day for a couple of days and my teeth are pearly white!! Even just one strip makes a huge difference!

You really do notice a difference after using this product consistently. Using these whitening strips in combination with any whitening toothpaste will ensure your best teeth. If you have very sensitive teeth you might experience some discomfort at first but will go away after a few uses.

I got these as a gift for my birthday. I've tried others before and I wasn't too excited to try another product that would irritate my mouth and not work. But these proved me wrong!! They're easy to use and I notice a differece already. I can't wait until I'm done!

I loooooveeeeeeeee these so much! They work and the one that comes with the little stick to boost whitening is awesome (I'm not sure if this is the specific one) but it definitely does weaken your enamel, i can feel it when i drink which is why i stopped using it !

Same as most commercial whitening products, the sensitivity is what gets to me the most. I love the the results, but suffering from multiple hours of tooth sensitivity makes this product hard to use on a regular basis. I guess that's just the price you pay for blinding pearly whites.

My teeth have always been fairly white, but I'm an avid coffee and wine drinker so they eventually started loosing that sparkle we all love in a smile. I've used my brands of whiteningsheios and other teeth whitening products and never got the results I truly desired so kinda gave up on it for a while and just did my twice a year dental cleaning worh whitening 1x a year but after 5 months it so, again, I'd lose the sparkle and desperately wanted something to use at home so my sparkle would return and thought I would get this gayer seeing great reviews for what I thought would be just a "little" help getting that fresh, whitened look back, because again, I didnt have alot of hope in anything at home but figured this may do a lil something. I used 1 set and they looked good as new & look veryyyyy natural!! I honestly was blown away, and thought I would have to use multiple ones over time to achieve the beautiful look I have now! I am sooo happy with my results. They didn't immediately look whiter after taking them off, but they did when I woke up the next morning :)