now how does this work [SEP] i suppose if i carefully read the manual that comes with the product i can figure out how to put it in my mouth so that the two separate heads do what they are supposed to do in the meantime i do whatever maybe some day i will figure out the correct brush position i have to concur with another reviewer that the head s are rather large and using this toothbrush in a small mouth as mine is takes some getting used to and i am accustomed to it after a few weeks of use i do not like it as well as my vitality sonic but my hygienist says the newer models are better the verdict will be decided i suppose with my next visit for my cleaning