As people say, it seems to do its job well. It claims to help reduce cavities, fight plaque, get rid of bad breath, and a variety of other things. As far as I can tell, it does help with all of those. But the first time you use it, be warned. It's taste is a tad strong. If you really hate spicy foods or things with a strong flavor, especially that of mint, try this with caution. I am one of these people, so my first mouthful just about made me lose my lunch, let alone keep it in my mouth for the requisite amount of time. It has a very strong spearmint taste, and also leaves a bit of an aftertaste. It also seems to have a distinct metallic tang that sticks around for a half-hour or so, but that might just be me. And it simply serves to remind me not to eat anything for a bit. But, now that I've been using it awhile, it does help keep my mouth fresh. And, it doesn't take long to get used to the strong taste. So...a bit risky on the taste, but pretty good overall.