not impressed [SEP] these are harder than sonicares regular brushes and harder than i prefer i noticed no difference in how clean my teeth felt or looked i floss regularly and i do not think directing a flow of water can do the same job of removing debris so for me directing water between my teeth probably does not do much except make it easier to accidentally splatter i also missed the inner rows of brushes that the rubber paddles replace and i know i felt the difference unless i see some hard evidence to the contrary i will continue to suspect this is just a marketing gimmick i will stick with the regular brushes