I purchased this product to aid in cleaning teeth better, since I was going to be wearing braces for a while to get teeth straightened and getting implants for missing teeth.
In spite of twice daily brushing with Sonicare and flossing with Glide, my dental visits were always associated with tremendous tartar build up. After my last encounter, I decided to give the Waterpik Flosser a try. It has been 6 weeks since my last cleaning and the Waterpik, used just once a day, has my teeth feeling like I just had a professional cleaning. I can hardly believe how amazingly effective this device has been for me. Just using the standard tip with the simple and easy to follow instructions has made me a believer for life.
I have been using WaterPiks for decades, and they are only getting better. You should still floss, brush (preferably with a Sonicare type brush, and swish mouthwash around.
But to really get the gunk out from between your teeth and below the gumline, this is the way to go. I probably sound like a commercial, but they really are awesome. Just bought my fourth one. (They last, too, as long as you keep 'em cleaned out.)