Very effective, but hurt my gums. White teeth but too painful.

Love them but i wish they were not that pricey.

I can't give a completely unbiased review on these because i could only use them twice. The taste they left in my mouth was so horrid I just couldn't do it. The price was okay, and my friends tell me they whiten great. I just can't get past the nasty taste, and they don't hold on well to my teeth which made me salivate uncontrollably.

I bought a box of these...they are pretty pricy, but they are very effective at whitening your teeth. I used the 2 hour ones, and about 1 1/2 hours in, \I started getting a pretty piercing pain, coincidentally my son got the same thing, but it lasted only 2 minutes, and was gone. My teeth were quite sensitive to cold for a couple of days after, but worth it to me to brighten my smile. Just an aside, there are 8 dollar coupons available for Canadians...do a google search and you should find them easily.

I found it hard to use and did nothing

crest whitestrips really do work wonderfully! they first time you use them you will notice a difference after 7 days! now i use them for a quick touch up here and there

I like how they work, they really do make your teeth whiter.

These strips definitely whiten your teeth! The only thing is you have to do it everyday for the full effectiveness!

This really does work great. Heading out and want to look your best? Well add the finishing touch by using this product. I had many people comment on how white my teeth look after using only one time.

I followed the instructions to the letter, and it just made a couple spots on my two front teeth white. Embarrassing, expensive, and SO not worth it!