Review (4/5): Works!
I should start by saying that I began using this product a few days after I used a sample of Crest White Strips. So, I already had a little head-start on whiter teeth. My teeth aren't that yellow, but I smoke and drink tea, so I'm a little sensitive to that.
I really do think this toothpaste works. I can see my teeth getting a little whiter after having used this for a week or so. I'm not a huge fan of the flavor (hence the 4 stars), but it's not too much of a turn-off and I'm getting used to it. My teeth feel very smooth and clean. I would recommend you try this... maybe do some white strips first, then use it to maintain!