Easy and convenient to use. I can see the difference when I use the pen.

Works as described. Doesn't make my teeth sensitive. Great product.

Great product, great price.

keeps my smile white

[This review was collected as part of a promotion.] This product was pretty easy to use and I saw the effects right away. Specifically on my lower teeth I saw improvement in just one use! The flavor is actually enjoyable to my. I like that the light has an automatic timer. The hardest part was holding my mouth open for 1 minute for the gel to dry! 😂

Works pretty well but well

I’m still in the process of using these. So far I’ve not noticed much difference. The product is easy to use. Great price

[This review was collected as part of a promotion.] The Crest 3D White Whitening Pen with Light erases surface stains and is similar to what dentists use. The pen allows easy precision application and the light helps boost the stain fighting gel. Plus it's safe for your enamel. I used this for week after breakfast. I brushed my teeth first than applied the gel. The first time I had to twist the bottom about 10 full times to get the product to start coming out. I used the included light which took about 5 minutes and then waited 30 minutes before eating or drinking. The gel feels and tastes similar to a fluoride treatment at the dentist. I’m definitely seeing a brighter whiter smile. The minty flavor did mildly upset my sensitive stomach .

[This review was collected as part of a promotion.] Crest 3D white pen with led light is very easy to use. Click the bottom of the pen for the gel to dispense. Then simply paint your teeth with the pen. After a half hour use the led light, which stays on for 5 minutes. Use twice a day. I did notice a slight difference in my teeth after 2 weeks, but I don’t see anymore difference after 4 weeks. The light died after 4 weeks, and you cannot replace the battery. They should make the light either rechargeable, or with replaceable batteries. I didn’t have any sensitivity or adverse affects. It has a light toothpaste flavor. Not overpowering. I had been wanting to try the pen for a long time, and wasn’t as impressed as I hoped I’d be. A friend did notice my teeth and mentioned they looked whiter.

I tried using this pen several times, but each time my teeth got worse instead of whiter. Not happy at all with this product.