Yup they work but you have to stick with it to get noticeable results. It takes anywhere between 1-2 weeks of straight usage before you will begin to notice a difference. Just read and follow the directions and you should begin to see results. If the crest white strips you buy at the store aren't strong enough for you, ask your dentist for professional crest white strips - you can only get them through a dentist and they are a bit stronger than the ones you buy in the store. I use the professional ones and have definitely noticed a difference. Also, just a side note, my dentist said not to use them right after you brush your teeth because your teeth are slick then and the gel can't grab on to your teeth.

Thanks floridagirl, appreciate it greatly.

Hey wait....

You can use the strips and yeah they work, but you may want to check out the crest night effects. No worry on gaps or anything. Just paint it on your teeth sleep wake up and in 3-5 days you will see a big difference. The package comes with a supply for 14 days but I only had to use it for 7.

My dentist wanted 1200 dollars to remove coffee stains from 3 teeth. I used this stuff for 14 dollars. Talk about a savings. And the strips cost here 28 dollars. The night effects does the job just as good with less time and money. And you can reapply it again in 6 months if you need it. Im not at the 6 mth part yet so cant say if ill need it or not, but so far no. It really really is worth it.

The only thing you will for sure need to do is buy a new tooth brush put it aside for after you are done with the night effects, it will ruin the brush, it getts sticky but use the same one until you finished.