These really hurt your teeth! They damage your enamel therefore your teeth are more sensitive. It definitely is something I won't purchase again! I've used them a few times and I'm not happy with results.

i used to have super yellow teeth because all i drink is coffee and that really put a damper on my teeth. after using this for about two months, i'm finally getting super white again. i 100% recommend.

Definitely brighten and whiten teeth but they do leave your teeth sensitive and can only be used twice a year. They are really easy to use and cost effective though.

These strips are amazing, the level of white they take your teeth so quickly. Like most white strips don't use them every day or your teeth will be SUPER sensitive to everything, but at least you will have white teeth

I use these to whiten my teeth whenever I feel like they need it and they work so well! My teeth are super white and strong! They stay on really well and taste a little weird, but they whiten really well, and safely!

These waiting strips are a van tastic they are easily accessible you could Byam pretty much anywhere. The results are great you instantly see whiter brighter teeth. But keep in mind if kept on for too long will make teeth are very sensitive.

I drink several cups of black tea daily and the Crest 3D White Whitestrips Professional Effects really did remove the stains as the box said it would. I use the strips daily because I do not want to give up my tea and I want nice white teeth.

When coffee, tea, and life keeps trying to darken your smile, use these little miracle strips to combat that by brightening and whitening your teeth! Smile Big and Bright with Crest 3D White Whitestrips! :-D

quick and cheap at home whitening treatment somewhat harsh on teeth so I only use every once in a while. I tried to use a few days apart and my gums were left a little sore

i'm not all the way through this set of whitening strips and i can see a difference, but they make my teeth really sensitive. i notice that after using them, my teeth are extra sensitive to cold temperatures in particular, but they definitely work.