Stick with Crest White Strips
I received this stuff quickly, and started using it right away.  I have fairly sensitive teeth (to whiteners), so I used it with sensadine toothpaste, and I only used it once a day.  You may think that's the reason why it failed, but I don't think so.  I've used it for almost 3 weeks without results, and I don't drink anything that's not clear or white, so there is no continual staining.  I had no sharp pains in my teeth, which is unusual for me when whitening.  It's almost like it doesn't have much of the powerful ingredient.  My teeth whiten easily, but this didn't do a thing.  Use Crest White Strips or some other brand.  This is cheap, but you'd be better off buying a pack of orbitz or something.]
Rating: 2 stars