Don't know why I waited so long to buy one. My dental hygienist recommended it for a particular tooth and the gum around it. I have stopped flossing with thread and use this twice a day. My teeth have never been cleaner or felt better. My bridge no longer collects debris since the Water Pic gets every drop!
I like the design of the Waterpik WP-100 and the ease in using it. I like the cord in front and the variety of heads that it comes with. The only thing I don't like is that the water reservoir is too small. I have to fill it twice. Once for the top and once for the bottom.