I have only used 6 of these so far and already my teeth are insanely more white!! I found that after only 2 uses my teeth were noticably whiter and had people commenting on them after the 3rd but also after the 3rd use I started getting sharp pains in my teeth usually around 10/15 minutes after I had taken the strips off. I had to stop using the strips for a few days and go back to them. I found that leaving a few days in between each use helped a little but the pain still occurs after every use. I also found that brushing my teeth straight after using the product can help to reduce the severity of the pain. Other than that I would definetly recommend this product to anyone who has yellow stained teeth as it's worked wonders on my own!

Professional Effects is worth the money. It does hold up to it's promise of whitening your smile back to what you wished it had been 20 years ago. The strips are high quality that do no slide, mush up, or foam at the mouth. They are very comfortable and much less painful as far as sensitivity issues of past strips. The brightness also last longer than Crest and other white strips brands of the past. I can't say you'll have bright, chicklet movie star teeth, but it will make you look young again and gives your confidence a boost.

I was a little dubious at first but after a couple of uses the results were remarkable. I`ve just stopped smoking but my teeth were never that bad as I frequently go to the dentist. After 10 days my teeth are now a dazzling brilliant white and pleased with the comments I`ve received. No sensitivity at all. Easy to apply and remove when finished. Highly recommended and cheaper than other methods.

[This review was collected as part of a promotion.] I really enjoyed this product. The strips were easy to use and helped remove the stains on my teeth. I drink a lot of coffee so my teeth has definitely stained from that. But this made a difference! It was not inconvenient at all. It was very easy to use and it didn’t have any bad taste or feeling. I left it on for 60 mins everyday for 11 days and it was perfect. I didn’t have any sensitivity issues and I have sensitive teeth! I’ll definitely recommend this.

I love Crest 3D White Whitestrips Professional Effects. I love how easy they are to use and have a big impact on my appearance. I love the way my teeth feel and how they look after using them. This product does exactly what it says, removes years of stains. Thank you Crest.

[This review was collected as part of a promotion.] I love the way these strips make my teeth whiter and brighter. They don’t make my teeth sensitive or anything, and it doesn’t have any flavor, just like any other whitening strips still not the most pleasant feeling but it makes my teeth whiter so, I’m happy with that. I wish the time was a bit shorter like the other whitening strips because this one you have to hold for 45 min. Other than that, these work great! I received this product complimentary for testing purposes.

I was very nervous about buying this. Not only was I skeptical about its ability to remove 14 years of stains but I thought spending money on something ineffective was stupid. It turns out, I was the stupid one for doubting this amazing product! I finally got this product and my teeth are so much whiter now. All the stains from coffee and tea are totally gone. It didn't even hurt my teeth! And my teeth are very sensitive. Please do not waste your money on other teeth whitening products. Free advice-Get this! Coming from a smart shopper, this product is totally worth every penny.

Knowing you can drink coffee or tea and no guilt feeling about the drink staining your pearl whites... 3-d crest say your back. THE feeling oh ahhh my teeth are only to be white and glowing for the holidays and everyday. feels nice someone has our backs and not our packets ... The product is amazing for the price. if you like comments about your smile this iz a product for you :)

[This review was collected as part of a promotion.] I absolutely love these Whitening strips from crest. They’re very easy to use and very comfortable to wear. Also my teeth didn’t get sensitive with these which is great and the packaging was easy to use. Overall, I would highly recommend these strips and they work fast and work really well. If you have a special occasion, and you would like to whiten your teeth, these are the whitening strips for you!

[This review was collected as part of a promotion.] My fault for not taking a before photo, but my teeth have never been whiter! They are so easy to use, and super convenient. It’s a quick and easy solution rather than going to have them professionally done. I will be buying these in the future!