Review title is Does not burn and smaells tastes good [SEP] This mouthwash does not burn, even after flossing.  It lingers with protection for several hours. Although not 12 hours that is refered to by Colgate.<br /> I have not had any black stains after 3 weeks use.  I only use it one time a day though.<br />This is an okay product, just as good as any colgate I've used, but I can't say I notice a huge improvement over the regular total mouthwash.