I can say enough good things about this unit--it is hands down the best toothbrush I have ever had! I am a little OCD when it comes to brushing & this unit leaves my mouth feeling cleaner than it ever has before. The unit is extremely powerful, yet gentle on the gums. I love the auto shutoff feature & the 5 multiple cleaning modes the unit offers. I've had units in the past that were far more expensive that this unit; however, this unit blows all of them out of the water!! You can't go wrong with this toothbrush--IT'S AMAZING!!!