LOVE using these things , I would use them every once or TWICE a month one in the beginning of the month and one towards the end of the month and they make my teeth look professional. If you have sensitive teeth I recommend you using them once a month or you'll get sharp pains on your teeth when eating cold foods. It can be a bit pricey but I highly recommend this product.

I bought this product several weeks ago, and did not receive the original box with instructions and expiration date. I called the Crest number previously given, and did learn that the strips were ok to use since they were still within the expiration date (which was not on the strips). What I was surprised to learn is that the professional effects strips should be used for 45 minutes and the Supreme Bright for 1 hour as these instructions were not included on the strips themselves.

I bought the Professional Whitestrips and admittedly waited a while before using them. I wanted whiter teeth, but was afraid of some kind of discomfort, as experienced in the past with other whiteners. A big birthday is coming up, so I took the plunge, couldn't procrastinate any longer. Wow, just as advertised, after three uses I saw a difference. The best part was no discomfort at all. Easy, easy process. Do put them on in front of a mirror. I've found they have an excellent grip on center front teeth, but once you get to the strips edges they are curled slightly after the 30 minutes. But that's ok!

I've used this for forever. It keeps my smile nice and bright. It does cause sensitivity but that's with all whiteners. It's super affordable and you don't actually need to use the whole kit to get results. I usually just do one strip a week to help with the sensitivity.

I used to bleach my teeth during my freshman year of highschool, never really had a problem and the results were mindblowing. I've always had sensitive teeth and never felt anything. Once (and i could've had a faulty set of strips or whatnot) I put them on and no more than five minutes later my teeth were on fire, I was borderline screaming. The next week my teeth were sensitive to everything, literally if I breathed through my mouth I'd start to cry. I never used them again and like I said I could have easily had a defected pack but before that they always worked great

I originally thought I could love these white strips because they are so convenient and know so many people who rave about them. The plus side is that they definitely were able to whiten my teeth several shades within just 2 treatments. The downside is that they made me teeth extremely sensitive. One way that I prevent that is using toothpaste for sensitive teeth. I will probably be trying out a different type of teeth whitener next time.

Love love love this! It works so well but doesn't make my teeth tender or sensitive like some other brands! It really works and removes stains super quick and it is seriously so effective! I'm loving this product so far and will definitely buy it again!

I like that they help whiten your teeth, the downfall is the price, as well as the taste. It tastes horrible and doesn't work as great as you would like considering the price point. I will be trying different products to see if there is a cheaper or more effective alternative out there. 

These actually work!! They really do whiten the teeth after a few uses and it's really easy to use. It can make your teeth a little sensitive but that goes away in a couple minutes of taking off I feel like. Try these if your looking for drastic results!

Yes these work ! I was wowed I've been using them for a few years now and I rarely do it anymore but my teeth are pearly white , it will probably sensitive on your teeth at first but it's well worth it trust me look at my Snow White teeth . Thank you Crest