I received my WP900 about 4 weeks ago. After 4 days the bit of tarter on my front teeth was gone. Normally I only see that after my routine dental appointment and cleaning. This was my hope. It is obvious to me that this system is cleaning my teeth and gums at least twice as well as hand brushing and flossing.
I bought this as a replacement from my old one. I can’t imagine my teeth without my Waterpik. It makes me feel like I have just gotten my teeth cleaned by a hygienist!
Overall I like the unit and the brushing action, but I don't like that I have to hold the button down on the waterpic handle to STOP the water from flowing. It should be just the opposite and that I push the button to have the water flow.
I am so happy I purchased as I'm not much of a flosser and the waterpik takes care of that. I go to bed with a totally clean mouth and wake up refreshed. I wish there was a spin brush attached as I don't understand how this one cleans - use waterpik with my regular toothbrush.