This product did a great job at whitening my teeth. I received many compliments on how white my teeth looked. I only gave 4 stars, because it did make my gums sore and it made my teeth a little sensitive. Nothing too serious though. It was worth the small discomfort for the whitening results I received.

This product did whiten my teeth, but made them ultra sensitive to anything that was remotely cold. I could barely drink a glass of water without my teeth hurting. If you do decide to use this product, buy sensodyne toothpaste.

I am very pleased with this product. I read on a consumer watch website that "original" version is actually more effective (and cheaper) than the premium, so I tried it. My teeth are at least 3 shades whiter, and I am a coffee addict. I found it best to wipe my teeth dry with a kleenex before applying. I had little problem with sensitivity, application, or mess. I only wish the bottom strip was a bit longer.

These work well and are easy to use, but they do tend to make the teeth sensitive. I do not have very sensitive teeth, but they did make my teeth feel pretty sensitive after a few days. But obviously they are not going to be perfect. If you are using harsh products to remove stains from your teeth, sensitivity should be expected. Also, you can get store brands for cheaper and they work the same.

On short term the product works well. I noticed whiter teeth after each application. I've only done half the box so I can't tell you how long it will last but the whitening does not seem to last, but I will admit over any toothpaste and brushing this will give you better results. I'm hoping the whitening is long term. 1 year is what I think the box says. In the beginning it burned a little bit and was not comfortable, but now I got used to it and there is no pain or discomfort any more. 30 minutes goes by really fast, but it's not something I can wear outside because it leaves a gooey mess on your teeth that you HAVE to rinse off.

Whitestrips are fantastic. They're very easy to use and not messy like some other reviewers claimed. I've been using these for the past 3 or 4 years about once a year, and my teeth look great. My teeth do feel a bit sensitive after I've been using them for a week, but that sensitivity went away within days of finishing the pack and all that has remained has been the whitening effect. These really do work and are worth the price and time to use them.

This product burned my gums and made my teeth VERY sensitive!!! It's messy, and doesn't do that great of a job! Not recommended.

These work well and worked immediately. I only used two and my teeth were white enough for me. They are slippery when on and I wouldn't go out in public with them but fine to use at home. Very convenient, work great and I think they are quite mild compared to the whitening solution you might get at a dentist. It would be nice to have longer strips to cover more teeth.

I used this product for the first time over a year ago when I noticed that certain shades of lipstick made my teeth look yellow. The results were fantastic. I used the product only on my top teeth so I could easily compare the difference to my un-whitened bottom teeth. Amazing! I only used the product for 7 days and the results lasted for a year. I've just bought another box and have begun the treatment for the second time. It's only been 3 days and I can already see improvement. A hint is to never use the strips immediately before or after brushing your teeth. This adds to gum irritation. I never had any tooth sensitivity, but my gums do burn a little while I'm using the strips, but nothing serious. Another tip is to dry your teeth with a towel before applying. That keeps the strips from sliding around. I recommend Crest Whitestrips to all my friends. Use them if you want compliments on your beautiful smile!

I love this product! The strips are easy to use and your teeth look so good afterwards. The price is right also.