[This review was collected as part of a promotion.] I was nervous to try this product because I have very sensitive teeth and whitening products usually bother me. It was easy to apply, dried quickly and didn’t leave a bad after taste - I felt like I had nothing there. I will be keeping it in my purse and excited to see results!

[This review was collected as part of a promotion.] I used this product for upwards of a month and I definitely noticed my teeth are whiter. I’m a coffee drinker so I’m not sure how long they will stay whiter once I stop using but I’m happy with the results I saw so far. Very easy to use. The brush is soft and applies a nice coat. I like that there are instructions on the pen itself. You do have to avoid eating or drinking for an hour after applying- very important to see results.

[This review was collected as part of a promotion.] I love using my whitening pen from Crest 3d. I use my pen every day, and it's so easy and convenient to use. I just brush on teeth, and I make sure not to eat or drink anything in an hour. So far, my teeth have gotten a little bit whiter with fewer stains as well. I am very happy so far.

[This review was collected as part of a promotion.] The pen is easy to use and very convenient. Results are not as immediate as you would see with whitening strips. Whitening does happen but very gradually. This is good for maintaining after you achieve the whitening results you are looking for. Good product.

[This review was collected as part of a promotion.] I used this religiously for two months straight and didn’t notice any difference in the whiteness of my teeth. It dries down quickly which I like so you don’t feel like you applied it and it’s instantly gone on your teeth once you close your mouth. My teeth didn’t get an increased sensitivity which has happened to me in the past with a lot of other whitening products. The pen was super easy to use and great to carry with me if I was staying somewhere for the night. I liked everything just wish I had seen an actual difference in my teeth.

[This review was collected as part of a promotion.] I liked that the pen was easy to apply and no real mess. It’s kinda awkward to keep your lips away from your teeth while it drys, but that step only takes about a minute. I only gave this 3 stars because I didn’t notice a big change in color, but I think this product would be great for upkeep after using a stronger teeth whitening product initially. I didn’t have any sensitivity, and as long as you don’t apply too much product, there’s no real taste to it which is also a plus. Overall the pen would be a great product for travel and maintaining a whiter smile after using the Crest Whitening Strips first for the biggest color change difference.

[This review was collected as part of a promotion.] The first picture with my hair straight is before I applied the whitening pen and the second with my hair curled is after 2 applications the same day and waiting for 1 hour before removing gel each time. I will say I love how it didn’t make my teeth super sensitive, and it did certainly help break up surface (extrinsic) stains. It was a super easy application. Make sure you brush your teeth before and after using!

[This review was collected as part of a promotion.] The Whitening Pen is very easy to use. You just click the bottom of the pen and wait until the product is on the pen and then brush it on! It whitened my teeth evenly and safely. The only caveat is that you can't eat or drink for an hour after using.

[This review was collected as part of a promotion.] I tried it for 2 weeks and noticed a bit of change. I’m sure with continued use, more whitening will occur. If you are sensitive to taste at all, this will be hard product to use. This taste was gross and hard to ignore.

[This review was collected as part of a promotion.] This Crest Whitening Pin is fantastic!! I noticed my teeth were whiter after ONE application! The first photo is before, second is after! I would highly recommend this product & I would definitely purchase it myself! It's very easy to use and perfect to throw in a purse or bag for on the go!