IT GETS THE GUNK OUT!!!!!
Sometimes when the main power  knob is turned on, it doesn't  have any power until you  push the (on) button that's located on the pick itself.  Sometimes  it gets power without pushing the on button located on the pick. I guess it's temperamental, but it does work well!!!  It gets the gunk out, cleans the gums,  makes for a happy mouth, and with mouthwash you add in,  leaves your breath smelling like a minty dew-drop.
Rating: 5 stars