My dentist noticed the difference when I stopped using this toothbrush! After a recent move, I was lazy and neglected to unpack my electric toothbrush, sticking to a normal one instead and after about a month at my teeth cleaning she noticed right off the bat! If that isn't an indicator that this thing makes a difference, I don't know what is. Also, the battery lasts FOREVER. I can share it with my boyfriend (switching out our different toothbush heads, obviously) and we can get weeks and weeks of use out of it before having to get the ugly charger out.