If you've read the literature you know that this product has been proven to be effective. If you haven't, it's out there and readily available - I recommend going through it to bust any doubts. This applies to all products originating from the original Listerine. Aside from effectiveness, which all the products have, the original is somewhat unique. It maintains the same burn and signature taste which in your mouth, but unline the other Listerines floating around (Cool Mint, for example# once the rinse is done your mouth isn't overwhelmed by the taste of lingering mint. It's truly nice. This product keeps your mouth at neutral rather pushing it to mint. With that being said, with the original there may be some lingering burning in your mouth for about 5 minutes after use. I personally enjoy it, but you may not. Overall great product. Does what it advertises, gives me a great burn and rough taste #which I love) and keeps my breath good enough to work in retail and after 5 hours of work be able to speak to a person face-to-face without fear of funky looks.