I can't honestly comment on the effectiveness of this product because I haven't been using it regularly. The gel is so thick, and the bottle is so hard that it's a pain to use. I'm going to try the BriteSmile pen that comes with the Tarte lipgloss. I might be willing to try this again if the packaging was changed.

GREAT PRODUCT THAT EASY TO USE!! PRETTY GOOD PRICE FOR THE MONEY!! USE WITH ANOTHER WHITENING TOOTHPASTE FOR AN ADDED BOOST TO WHITENING TEETH!!!!! DEFINITELY WOULD RECOMMEND THIS PRODUCT TO ANYONE!!!!

I like this product but after using half the bottle I couldn't squeeze out the second half. I had to cut the hard plastic bottle in half to get to the rest of the product. This discouraged me from buying it again even though I like it.

Easy to use. I don't notice a taste other than the taste of my toothpaste. It does as it advertises and whitened my teeth. I am a soda drinker and this product worked wonders to get those stains out. I highly recommend it.

This actually works. I rarely review products, most products are disappointments but this one works. I've had my teeth professionally and costly whitened several times and it never lasted long. It wont last until I stop drinking tea (but I'm not going to). If you are like me, someone who drink tea (or coffee) frequently, then the only way to keep your teeth white is to whiten them everyday and it is very easy to do with Arm & Hammer Dental Care Whitening Booster. $6-$7 is a minute fraction of what I was paying on professional whitening (try $300 a session). It tastes bad but it is intended to be used with toothpaste so it's virtually unnoticeable. And... my teeth are white! Every day! :D

I use this product daily with my toothpaste every time I brush. I like it better than other whitening products (strips, etc) because it does not make my teeth sensitive and I get a feeling of clean!

I have been amazed by this product. Simply apply it onto your toothpaste on your dampened toothbrush. I have been brushing twice a day for just one week, and can already see a very noticeable whitening. Easy dispensing bottle. Tap on the bottom of the bottle just before using and it will dispense easy. There is a note explaining this on the bottle.

The proof will come next time I see the dentist. I can't give up my daily cup of coffee. I have stained teeth due to dry mouth from head and neck cancer, and the salivary glands do not work like they are supposed to so I have to have a more disciplined approach to oral hygiene.

Easy to use, but noticed only very slight improvement in whiteness (after 2nd bottle).

This has no bad taste, easy to use and is really showing results. I would purchase it again. Low cost approach to slowly getting your teeth whiter!