Of course crest whitening strips work. The stronger ones, the better. I knocked off a star because these caused sensitivity issues for me. I had to switch to gentle routine version that are only worn 5 min. I tried wearing these for five min but sensitive issues persisted. If you don't have that problem then def try these for bright white teeth. Look for coupons.

Never used any strips or any whitening agents except normal whitening toothpaste on occasions. Was skeptical and I intentionally took photo before and after 14 days as seen below I still have 6 days to go before my pack is finished. I work abroad and when I shared the photo with my wife she said photo shopped? I said it is not!!! I always thought my teeth was fairly white and in good condition, until I realized how bad it was looking at this photo's I am quite embarrassed to be honest. Needless to say I will stock up on this product, never want to be in the “before” position again urggggg. I do however wish they have included shade strip, then I could determine how many shades I am whiter seems more than 34 as stated on the package. Still embarrassed though that I waited this long. Highly recommended and can't wait to take some for my family to use. Almost forgot same spot photo taken, considering light and no filters, no editing, I just cropped to hide my face and give you true sense comparison. I am truly embarrassed! Ok just loaded photo's, I know it is till not perfect and I still gave 6 days to go! Maybe Crest will be raising their prices after this review, I hope not I am in the US in mid June only LOL

Absolutely love these whitening strips! They're perfect to just put on while you do your makeup and take off and they leave you with a pearly white smile! They do unfortunately make your teeth a bit sensitive but all whitening products do that. Highly recommend !!

Before I originally started using this product my teeth were very yellow. After using this combo consecutively I can finally say I've gained so much confidence in my smile & their so much whiter. This is definitely beneficial if you're trying to regain confidence in your smile.

Very good product if you are will to spend the money. Definitely does a great job whitening if you use as directed. But for the price I would rather just buy hydrogen peroxide to white my teeth with since it's literally the same thing but in liquid form and less than a dollar at most stores. Strips also make my teeth super sensitive.

I have been using those for years and they never disappoint, I have very sensitive teeth and because of drinking tea and coffee, my teeth yellow easily, and I have tried other products, but this product is what I stick and I gave up changing  , prize could be a little better, but you get what you pay

The Crest 3D White Radiant Express Strips work really, really well. My teeth look whiter just after using it a few times and I'm excited to see the results after the full 14 day treatment course. The strips are very easy to apply, they peel off easily and adhere to teeth without slipping. I didn't have any problem keeping them on my teeth for 1 hour, while I worked around the house. After I used them a couple days in a row, I did notice mild tooth sensitivity but it resolved as the day went on. I did take a break for a day from using the strips and it didn't happen since. I would recommend using these strips every other day or every few days if you have sensitive teeth to avoid sensitivity. These strips absolutely work great at whitening teeth. So effective and much cheaper than going for a whitening treatment at the dentist. I absolutely recommend these strips for at home teeth whitening!

bought these because I am a two can a day pop drinker. I regularly go to the dentist but my teeth were not getting any white. I have an army buddy that uses these and I figured I would too. They can be a little odd to get used to for the hour or so that you use them and after the first 4 or 5 it may not seem like a difference, I guarantee you that when you are on the last 2 or3 strips you will be amazed! It bought some for my wife and recommend them to everyone I know who wants to whiten their smile. The price seems a bit crazy at first but you will see a major difference u less you have a naturally sparkling teeth… I do not. I have wondered why they sell less whitening strips… maybe to maintain a white smile… I guess. If you brush your teeth regularly and due to what you eat or drink or even the well water you mmm at be on, use these stops and you will get back to a white smile.

Love these whitestrips I have been using these white strips for many years. I just love how they make my teeth whiter and brighter. I get so many compliments on my teeth, even my dentist exclaims how white they are and ask what I use. They even laugh when they have to move the light above me because they are so bright. I would, and have recommended these white strips to my family and friends. I use the professional effects.Less

I love these strips when I'm trying to get my teeth white. They definitely do their job. However, they make my teeth very sensitive to cold things. When trying to drink really cold drinks my teeth are very sensitive or ice cream. I definitely recommend for fast whitening but if you have sensitive teeth maybe stay away from these.