These whitening strips really do a great job. They stay in place and don't make my teeth sensitive. Really can't complain too much. I've used these several times.

I think they did their job but I'm a triple threat to white teeth - I drink very dark black coffee, eat dark chocolate and drink the darkest of red wines. I think if I ate less staining food I'd see much better results.

I love, love this whitening kit! My teeth get stained from coffee and chewing tobacco, but this whitening kit takes away those stains within a few uses!

These whiten my teeth fairly well. It's not a huge difference but it definitely helps. These make my teeth incredible sensitive and painful if left on for more than 15-20 minutes.

If your teeth are already pretty clean and free of stains you likely will not be seeing much difference as this is mainly to get rid of surface stains

These white strips admittedly are a little pricey- but so worth it in my opinion. I recommend using them three times a week for a most noticeable white. These are a staple when I have extra cash.

You will absolutely see results pretty much immediately after using the crest white strips. I don't know of any competitor products that do the job quite as well and that are as convenient as the strips.

Killed me! This hurt the nerves after using so much. I always read people saying it doesn't hurt their sensitive teeth so I always think it'll work but never does. Don't use if you have have sensitive teeth!

I have sensitive teeth so I literally can't use this. I know so many people who have whitened smiles from this brand but whenever I try my teeth literally just hurt immediately. If you have sensitive teeth this is not for you

This is the best whitening strips I have ever used. In just 2 weeks after 2 uses, my teeth are visibly whiter. The strips sit on great however large amounts of saliva can loosen them, so be aware. Other than that they are wonderful!