These products completely are changing my life I am in recovery now almost 3 years sober but have always struggled with appearance issues and my teeth weren't so white after carelessness and ciggerettes smoking. My teeth are getting whiter I'm loosing weight and starting to love myself again and because of this product I love my smile again.

I used one package per day for 3 or 4 days and I saw results! They say to use for 20 days straight twice per year so I am excited to see my ending results. Now I am just using one package every few days. I use one package at night and there is sensitivity afterwards even when I drink room temperature water. When I wake up the next morning, I feel minor sensitivity and it doesn't bother me that much. The next day or two I feel minor sensitivity but it goes away after while. I had sensitive teeth before using the product which impacts it but overall they work great.

I grew up with not the best teeth cleaning standards. Resultantly, I have had stained teeth that I couldn't do much about. I have tried many whitening aids from gels and trays to whitening strips, whitening toothpastes, mouth rinses, etc. I tried the original crest whitestrips and was not impressed. I recently purchased Crest 3D White Professional Effects, and noticed a difference after the first strip was removed. At day 3, just as the box says, a definite difference was shown. Others have noticed as well. The first day I had slight sensitivity, but I have not had that problem since.

It's not often that you find a product that actually does what it claims to do, however, the Crest Professional Effects White Strips give you professional results while costing 90% less than whitening with a dentist. I am always receiving compliments on how white my teeth look. I enjoy red wines, coffee and tea, which cause staining. The Crest Strips remove these stains easily.

Just started using these a little over a week ago and I'm loving my results! They are easy to apply and instead of waiting 30 minutes I wait around 45 minutes. My teeth get a little sensitive after taking them off but after a hour the sensitivity is gone away.

Product not as shown at all. As others have reviewed, I received mine in a brown cardboard box with strips thrown into the box. One card of advertising with pitiful instructions was in the box. Strip packs have no instructions on them either. They look like 'seconds' offered to SamsClub in after-market discounts from failed products from Crest. Will NOT buy again from Sams. Are these even authentic? Where is SamsClub quality control?

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 purchased the 2 week pack and these strips have come a long way! They now actually latch to your teeth in a sense. There is no slipping and sliding or worried about tasting the nasty product gel. Leave them on for 30 minutes before bed and see results in the allotted time frame. I also have sensitive teeth and have not had a problem with them.

This product is really good and keeps my teeth looking great! I don't use this product often only because it's not great on your teeth using Frequently I'd say 2 twice a month. I've purchased this product many times and will continue to, the taste is a little wacky but hey it gets the job done!

I started using Crest Professional White Strips last year. I whiten my teeth once a year. These white strips are by far the best product on the market. My teeth are not really stained, however, due to me being an avid coffee drinker, I choose to whiten yearly. These strips are awesome, and I have not had any sensitivity so far. Try them out, and I'm sure you won't be disappointed.