Worst product ever! I bought these less than a month ago because of the low price. I’ve used other crest whitening strips and have never had a problem with them. I used these crest white strips the recommended way for 30 minutes and I started to notice my gums would start tingling and burn so bad that I had to take them off sometimes. I started to notice my gums were turning white and even starting to recede. I am so upset and want my money back. I can’t believe they are allowed to sell these.

I was excited to try these but after just 3 minutes on my teeth, there was a super sharp, radiating pain. I’ve never thought of my teeth to be sensitive, but with this product they were... definitely don’t get this if you even THINK you might have sensitive teeth.

These are the best drugstore whitening strips that you can buy. I've been using these since I was 16 years old and got my braces off. I especially prefer the professional effects, they stay better on your teeth and I believe I see better results. If you're looking for a quick and easy way to whiten your teeth this is it. 

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.

These whitening strips work really good!!! I love how I use them on the go! When I’m in a car driving to work or on the train even! It takes 40-45 mins to kick in and give you the nice white teeth! As a dental professional I recommend use these strips 1-2 a week for 30 minutes! Your teeth will become Snow White! Give it some time :)

My teeth weren't very yellow to start with so I thought they would work relatively well as my boyfriend used them and his are very white. I finished my 20 days last night and took an after picture to compare with before using the same lighting conditions. There is no visible change, however my boyfriend thinks they're whiter. I think they're brighter and lighter but a light cream colour. My eyes are white and my teeth are yellow

Great! I use these before events. Just to say if you are going to use them a ton, you may not have enough. I wish that it had more strips since you pay lots for it. It does work miracles though! I definitely recommend if you at are willing to pad the price for only a few strips:(

I get complimented daily on my teeth! Even after I stopped using the product for about 3 years, I still get asked every day how my teeth are so white! I recently started re using the strips again and it just amazes me how well they work! And it last which is the best part about it. Definitely a long term product! I recommend this product to everyone that ask!

Expensive and uncomfortable...have to put those strips and endure an hour of disgusting foam in my mouth everyday. The strips are made small now so they have trouble sticking to my teeth...i can see them slightly whiter but not worth the trouble or money

I used my white strips every few months and constantly get so many compliments on how white my teeth are! My dentist even raves about my white teeth. The strips do make my teeth sensitive the day after, but sometimes beauty is pain and the results are so worth it!