I was pleasantly surprised by their kit. Very easy to use. Didn't make my mouth feel “weird” and my teeth feel and look better after only a few uses. I'm a heavy smoker and coffee/soda drinker. Always look out for coupons in combination with sales at the drugstore or grocery. Best time to buy.

So,I'm teenager and you know how important look is to almost all of us.As a child I wore braces because my teeth were looking wierd.I never smiled because of it.When came time for taking it off I was so happy .But my teeth were dark cause I had some problems with brushing my teeth.It's hard to brush teeth when you have braces.So I were shy again and never smiled.One day my mum bought me Crest 3D White Whitestrips and at first I didn't believe in it cause it sounds like miracle.I tried them and I suprised so much.Today I have Hollywood smile and boyfriend who loves me and my smile.The both of us use Crest 3D White Whitestrips now.Thank you Crest 3D soooo much!WE love you!Greets from Anna and Martin :*

I feel as if these do work and do not slip off of your teeth. BUT, I have such sensitive teeth that I can no longer use these. If you use these, simply be careful and aware that they can cause sensitivity. I would recommend these if you've never had sensitivity issues because they get the job done in brightening your smile.

If you're going to do this at home this brand is the way to go. They're gentle but work and I didn't experience tooth sensitivity until around 5 days of doing it. I actually just use them when my teeth start looking a little dingy and it works. I've never had my teeth professionally whitened and maybe I will one day. For now this works for me. I use it with an oral led light as well sometimes.

Love this teeth whitening kit, although I've only purchased it once because it's kind of expensive to constantly buy them. My results after a use of them were shocking, I definitely saw a difference in my teeth in a good way. I would purchase this product more often if it wasn't so pricy for my budget!

I've used CWS Professional Effects several times. I was on vacation with my sisters and they asked how I got my teeth so white? I told them Crest White Strips - Professional Effects. As soon as they returned home, they bought a box and now they have beautiful white teeth also.

The hype for this product is crazy so I was excited to try it out but found them to be disappointing. I didn't notice much of a change in my teeth color and found that the strips don't extend far enough back to get some of my teeth on the back/sides. They did leave my gums/teeth a bit sensitive after use but the sensation did fade away after a few hours. I would not buy these again :/

I love the crest strips because they are so easy. They do not run or drip like messy gels, pastes, and liquids. They're painless, and do not have a fould scent or odor either. This makes them my go-to choice for over-the-counter whitening tool kits. Crest is a brand we all know and trust, and these little strips really work. I don't know about "14" years of stains, but I definitely have noticed a difference in my smile since I began using them.

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!

Love this kit and would recommend using it. I would be careful if you have sensitive teeth though. It doesn't turn white right away, but you do see results slowly if you continue to use it consistently for a couple of weeks or months. I'm always afraid of swallowing the bubbles or chemicals that spill out of the tape. You're not supposed to brush the teeth after peeling it. I normally brush and then put them on for 30 minutes, take it off and go to sleep.